Nuveen Insured Tax-Free Advantage Municipal Fund

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, DC 20549

FORM N-Q


QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANY

Investment Company Act file number         811-21213         

        Nuveen Insured Tax-Free Advantage Municipal Fund         
(Exact name of registrant as specified in charter)


        333 West Wacker Drive, Chicago, Illinois 60606         

(Address of principal executive offices) (Zip code)


Jessica R. Droeger—Vice President and Secretary
        333 West Wacker Drive, Chicago, Illinois 60606         

(Name and address of agent for service)

Registrant's telephone number, including area code:         312-917-7700        

Date of fiscal year end:            10/31          

Date of reporting period:          01/31/05         

Form N-Q is to be used by management investment companies, other than small business investment companies registered on Form N-5 (§§ 239.24 and 274.5 of this chapter), to file reports with the Commission, not later than 60 days after the close of the first and third fiscal quarters, pursuant to rule 30b1-5 under the Investment Company Act of 1940 (17 CFR 270.30b1-5). The Commission may use the information provided on Form N-Q in its regulatory, disclosure review, inspection, and policymaking roles.

A registrant is required to disclose the information specified by Form N-Q, and the Commission will make this information public. A registrant is not required to respond to the collection of information contained in Form N-Q unless the Form displays a currently valid Office of Management and Budget (“OMB”) control number. Please direct comments concerning the accuracy of the information collection burden estimate and any suggestions for reducing the burden to the Secretary, Securities and Exchange Commission, 450 Fifth Street, NW, Washington, DC 20549-0609. The OMB has reviewed this collection of information under the clearance requirements of 44 U.S.C. § 3507.

Item 1. Schedule of Investments

Portfolio of Investments (Unaudited)
Nuveen Insured Tax-Free Advantage Municipal Fund (NEA)
January 31, 2005


Principal

Optional Call

Market

Amount (000)

Description(1)

Provisions*

Ratings**

Value


Alabama - 8.3% (5.5% of Total Investments)

 

$

5,655

Colbert County-Northwest Health Care Authority, Alabama, Revenue Bonds, Helen Keller Hospital,

6/13 at 101.00

Baa3

$    5,786,875

   Series 2003, 5.750%, 6/01/27

 

3,100

Huntsville Healthcare Authority, Alabama, Revenue Bonds, Series 1998A, 5.400%, 6/01/22 - MBIA

5/12 at 102.00

AAA

3,423,206

   Insured

 

6,280

Jefferson County, Alabama, Sewer Revenue Capital Improvement Warrants, Series 2002D, 5.000%,

8/12 at 100.00

AAA

6,992,152

   2/01/32 (Pre-refunded to 8/01/12) - FGIC Insured

 

1,750

Montgomery, Alabama, General Obligation Warrants, Series 2003, 5.000%, 5/01/21 - AMBAC Insured

5/12 at 101.00

AAA

1,890,123

 

4,500

Sheffield, Alabama, Electric Revenue Bonds, Series 2003, 5.500%, 7/01/29 - AMBAC Insured

7/13 at 100.00

Aaa

5,025,825


Arizona - 3.8% (2.5% of Total Investments)

 

10,000

Maricopa County Pollution Control Corporation, Arizona, Revenue Bonds, Arizona Public Service

11/12 at 100.00

AAA

10,490,600

   Company - Palo Verde Project, Series 2002A, 5.050%, 5/01/29 - AMBAC Insured


California - 28.8% (19.0% of Total Investments)

 

13,500

California, General Obligation Refunding Bonds, Series 2002, 5.250%, 4/01/30 - XLCA Insured

4/12 at 100.00

AAA

14,372,910

 

7,500

California, General Obligation Bonds, Series 2004, 5.000%, 4/01/31 - AMBAC Insured

4/14 at 100.00

AAA

7,838,850

 

26,300

California State Public Works Board, Lease Revenue Bonds, Department of General Services, Capital

12/12 at 100.00

AAA

27,502,962

   East End Project, Series 2002A, 5.000%, 12/01/27 - AMBAC Insured (PLG)

 

2,910

Cathedral City Public Financing Authority, California, Tax Allocation Bonds, Housing Set-Aside,

8/12 at 102.00

AAA

3,077,965

   Series 2002D, 5.000%, 8/01/26 - MBIA Insured

 

2,500

Irvine Public Facilities and Infrastructure Authority, California, Assessment Revenue Bonds, Series

3/05 at 103.00

AAA

2,575,975

   2003C, 5.000%, 9/02/23 - AMBAC Insured

 

4,000

Montara Sanitation District, California, General Obligation Bonds, Series 2003, 5.000%, 8/01/28 -

8/11 at 101.00

AAA

4,191,120

   FGIC Insured

 

Plumas County, California, Certificates of Participation, Capital Improvement Program, Series

2003A:

1,130

   5.250%, 6/01/19 - AMBAC Insured

6/13 at 101.00

AAA

1,254,718

1,255

   5.250%, 6/01/21 - AMBAC Insured

6/13 at 101.00

AAA

1,384,052

 

1,210

Redding Joint Powers Financing Authority, California, Lease Revenue Bonds, Capital Improvement

3/13 at 100.00

AAA

1,276,695

   Projects, Series 2003A, 5.000%, 3/01/23 - AMBAC Insured

 

3,750

Sacramento Municipal Utility District, California, Electric Revenue Bonds, Series 2003R, 5.000%,

8/13 at 100.00

AAA

3,939,975

   8/15/28 - MBIA Insured

 

1,500

San Diego Community College District, California, General Obligation Bonds, Series 2003A, 5.000%,

5/13 at 100.00

AAA

1,573,770

   5/01/28 - FSA Insured

 

3,000

San Jose Redevelopment Agency, California, Tax Allocation Bonds, Merged Area Redevelopment Project,

8/10 at 101.00

AAA

3,094,800

   Series 2002, 5.000%, 8/01/32 - MBIA Insured

 

1,055

Turlock Irrigation District, California, Certificates of Participation, Series 2003A, 5.000%,

1/13 at 100.00

AAA

1,100,112

   1/01/28 - MBIA Insured

 

6,300

University of California, Revenue Bonds, Multi-Purpose Projects, Series 2003A, 5.000%, 5/15/33 -

5/13 at 100.00

AAA

6,575,310

   AMBAC Insured


Colorado - 3.8% (2.5% of Total Investments)

 

Bowles Metropolitan District, Colorado, General Obligation Bonds, Series 2003:

4,300

   5.500%, 12/01/23 - FSA Insured

12/13 at 100.00

AAA

4,878,479

3,750

   5.500%, 12/01/28 - FSA Insured

12/13 at 100.00

AAA

4,206,113

 

1,450

Colorado Educational and Cultural Facilities Authority, Charter School Revenue Bonds, Peak-to-Peak

8/14 at 100.00

AAA

1,581,124

   Charter School, Series 2004, 5.250%, 8/15/24 - XLCA Insured


Florida - 1.1% (0.8% of Total Investments)

 

3,000

Pinellas County Health Facilities Authority, Florida, Revenue Bonds, Baycare Health System, Series

5/13 at 100.00

A1

3,180,930

   2003, 5.500%, 11/15/27


Georgia - 1.4% (0.9% of Total Investments)

 

3,825

Metropolitan Atlanta Rapid Transit Authority, Georgia, Sales Tax Revenue Bonds, Second Indenture

1/13 at 100.00

AAA

3,983,355

   Series 2002, 5.000%, 7/01/32 - MBIA Insured


Illinois - 3.9% (2.6% of Total Investments)

 

Cook County School District 100, Berwyn South, Illinois, General Obligation Refunding Bonds, Series

2003B:

905

   5.250%, 12/01/21 (Pre-refunded to 12/01/13) - FSA Insured

12/13 at 100.00

Aaa

1,028,234

405

   5.250%, 12/01/21 - FSA Insured

12/13 at 100.00

Aaa

447,254

 

Cook County School District 145, Arbor Park, Illinois, General Obligation Bonds, Series 2004:

3,285

   5.125%, 12/01/20 - FSA Insured

12/14 at 100.00

Aaa

3,613,139

2,940

   5.125%, 12/01/23 - FSA Insured

12/14 at 100.00

Aaa

3,198,838

 

2,500

Illinois Health Facilities Authority, Revenue Bonds, Lake Forest Hospital, Series 2003, 5.250%,

7/13 at 100.00

A-

2,589,300

   7/01/23


Indiana - 8.9% (5.8% of Total Investments)

 

2,500

Evansville, Indiana, Sewerage Works Revenue Refunding Bonds, Series 2003A, 5.000%, 7/01/23 - AMBAC

7/13 at 100.00

AAA

2,678,375

   Insured

 

2,190

Indiana Bond Bank, Common School Fund Advance Purchase Funding Bonds, Series 2003B, 5.000%,

8/13 at 100.00

AAA

2,363,689

   8/01/19 - MBIA Insured

 

1,000

Indiana University, Student Fee Revenue Bonds, Series 2003O, 5.000%, 8/01/22 - FGIC Insured

8/13 at 100.00

AAA

1,075,490

 

IPS Multi-School Building Corporation, Indiana, First Mortgage Revenue Bonds, Series 2003:

11,020

   5.000%, 7/15/19 - MBIA Insured

7/13 at 100.00

AAA

11,971,797

6,000

   5.000%, 7/15/20 - MBIA Insured

7/13 at 100.00

AAA

6,500,640


Kansas - 2.4% (1.6% of Total Investments)

 

6,250

Kansas Development Finance Authority, Revenue Bonds, Board of Regents, Scientific Research and

4/13 at 102.00

AAA

6,755,938

   Development Facilities Projects, Series 2003C, 5.000%, 10/01/22 - AMBAC Insured


Kentucky - 0.5% (0.3% of Total Investments)

 

Kentucky State Property and Buildings Commission, Revenue Refunding Bonds, Project 77, Series 2003:

340

   5.000%, 8/01/23 - MBIA Insured

8/13 at 100.00

AAA

379,549

985

   5.000%, 8/01/23 - MBIA Insured

8/13 at 100.00

AAA

1,056,856


Louisiana - 2.3% (1.5% of Total Investments)

 

5,785

New Orleans, Louisiana, General Obligation Refunding Bonds, Series 2002, 5.300%, 12/01/27 - FGIC

12/12 at 100.00

AAA

6,335,443

   Insured


Massachusetts - 4.9% (3.3% of Total Investments)

 

9,000

Massachusetts Bay Transportation Authority, Senior Sales Tax Revenue Refunding Bonds, Series 2002A,

7/12 at 100.00

AAA

9,428,130

   5.000%, 7/01/27 - FGIC Insured

 

1,125

Massachusetts Development Finance Authority, Revenue Bonds, Middlesex School, Series 2003, 5.125%,

9/13 at 100.00

A1

1,203,491

   9/01/23

 

3,000

Massachusetts Turnpike Authority, Metropolitan Highway System Revenue Bonds, Senior Series 1997A,

1/07 at 102.00

AAA

3,062,370

   5.000%, 1/01/37 - MBIA Insured


Michigan - 12.0% (7.9% of Total Investments)

 

6,130

Detroit, Michigan, Senior Lien Water Supply System Revenue Bonds, Series 2003A, 5.000%, 7/01/23 -

7/13 at 100.00

AAA

6,575,528

   MBIA Insured

 

4,465

Detroit, Michigan, Senior Lien Water Supply System Revenue Refunding Bonds, Series 2003C, 5.000%,

7/13 at 100.00

AAA

4,806,394

   7/01/22 - MBIA Insured

 

955

Grand Rapids Community College, Kent County, Michigan, General Obligation Refunding Bonds, Series

5/13 at 100.00

AAA

1,062,590

   2003, 5.250%, 5/01/18 - AMBAC Insured

 

10,800

Michigan Strategic Fund, Limited Obligation Resource Recovery Revenue Refunding Bonds, Detroit

12/12 at 100.00

AAA

11,419,380

   Edison Company, Series 2002D, 5.250%, 12/15/32 - XLCA Insured

 

2,250

Romulus Community Schools, Wayne County, Michigan, General Obligation Refunding Bonds, Series 2001,

5/11 at 100.00

AA+

2,468,925

   5.250%, 5/01/25

 

6,500

Wayne County, Michigan, Limited Tax General Obligation Airport Hotel Revenue Bonds, Detroit

12/11 at 101.00

AAA

6,753,500

   Metropolitan Wayne County Airport, Series 2001A, 5.000%, 12/01/30 - MBIA Insured


Missouri - 1.1% (0.7% of Total Investments)

 

Clay County Public School District 53, Liberty, Missouri, General Obligation Bonds, Series 2004:

1,325

   5.250%, 3/01/23 - FSA Insured

3/14 at 100.00

AAA

1,464,403

1,500

   5.250%, 3/01/24 - FSA Insured

3/14 at 100.00

AAA

1,652,985


Nebraska - 1.9% (1.2% of Total Investments)

 

5,000

Lincoln, Nebraska, Sanitary Sewerage System Revenue Refunding Bonds, Series 2003, 5.000%,

6/13 at 100.00

AAA

5,252,650

   6/15/28 - MBIA Insured


Nevada - 0.9% (0.6% of Total Investments)

 

2,315

Clark County, Nevada, Subordinate Lien Airport Revenue Bonds, Series 2001B, 5.200%, 7/01/31 - FGIC

7/11 at 100.00

AAA

2,423,134

   Insured


New Mexico - 1.4% (0.9% of Total Investments)

 

New Mexico State University, Revenue Bonds, Series 2004:

1,975

   5.000%, 4/01/19 - AMBAC Insured

4/14 at 100.00

AAA

2,156,108

1,530

   5.000%, 4/01/23 - AMBAC Insured

4/14 at 100.00

AAA

1,646,969


New York - 9.4% (6.2% of Total Investments)

 

25,000

Metropolitan Transportation Authority, New York, Transportation Revenue Refunding Bonds, Series

11/12 at 100.00

AAA

26,053,750

   2002F, 5.000%, 11/15/31 - MBIA Insured


North Carolina - 3.3% (2.2% of Total Investments)

 

8,700

North Carolina Medical Care Commission, Revenue Bonds, Maria Parham Medical Center, Series 2003,

10/13 at 100.00

AA

9,227,916

   5.375%, 10/01/33 - RAAI Insured


Ohio - 0.9% (0.6% of Total Investments)

 

2,270

Columbus, Ohio, Tax Increment Financing Bonds, Easton Project, Series 2004A, 5.000%, 12/01/21 -

6/14 at 100.00

AAA

2,444,336

   AMBAC Insured


Oregon - 3.9% (2.6% of Total Investments)

 

9,350

Oregon Health Sciences University, Revenue Bonds, Series 2002A, 5.000%, 7/01/32 - MBIA Insured

1/13 at 100.00

AAA

9,762,616

 

1,000

Sunrise Water Authority, Oregon, Water Revenue Bonds, Series 2004, 5.000%, 3/01/19 - FSA Insured

3/14 at 100.00

AAA

1,090,220


Pennsylvania - 8.6% (5.7% of Total Investments)

 

3,000

Lehigh County General Purpose Authority, Pennsylvania, Hospital Revenue Bonds, St. Luke's Hospital

8/13 at 100.00

BBB

3,077,340

   of Bethlehem, Series 2003, 5.375%, 8/15/33

 

2,000

Philadelphia Gas Works, Pennsylvania, Revenue Bonds, General Ordinance, Fourth Series 1998,

8/13 at 100.00

AAA

2,082,180

   5.000%, 8/01/32 - FSA Insured

 

Philadelphia, Pennsylvania, Water and Wastewater Revenue Bonds, Series 1997A:

925

   5.125%, 8/01/27 - AMBAC Insured

8/07 at 102.00

AAA

986,753

4,075

   5.125%, 8/01/27 - AMBAC Insured

8/07 at 102.00

AAA

4,329,606

 

13,000

State Public School Building Authority, Pennsylvania, Lease Revenue Bonds, Philadelphia School

6/13 at 100.00

AAA

13,515,450

   District Project, Series 2003, 5.000%, 6/01/33 - FSA Insured


South Carolina - 7.3% (4.8% of Total Investments)

 

5,000

Florence County, South Carolina, Hospital Revenue Bonds, McLeod Regional Medical Center, Series

11/14 at 100.00

AAA

5,491,700

   2004A, 5.250%, 11/01/23 - FSA Insured

 

Greenville County School District, South Carolina, Installment Purchase Revenue Bonds, Series 2003:

3,000

   5.000%, 12/01/22

12/13 at 100.00

AA-

3,161,850

1,785

   5.000%, 12/01/23

12/13 at 100.00

AA-

1,875,928

 

1,365

Myrtle Beach, South Carolina, Water and Sewerage System Revenue Refunding Bonds, Series 2003,

3/13 at 100.00

AAA

1,533,072

   5.375%, 3/01/19 - FGIC Insured

 

8,000

South Carolina Transportation Infrastructure Bank, Revenue Bonds, Series 2002A, 5.000%, 10/01/33 -

10/12 at 100.00

Aaa

8,311,680

   AMBAC Insured


Texas - 13.1% (8.6% of Total Investments)

 

7,975

Fort Bend Independent School District, Fort Bend County, Texas, General Obligation Bonds, Series

8/10 at 100.00

AAA

8,432,526

   2000, 5.000%, 8/15/25

 

12,500

Grand Prairie Independent School District, Dallas County, Texas, General Obligation Bonds, Series

2/13 at 100.00

AAA

13,107,000

   2003, 5.125%, 2/15/31 - FSA Insured

 

5,515

Houston, Texas, General Obligation Refunding Bonds, Series 2002, 5.250%, 3/01/20 - MBIA Insured

3/12 at 100.00

AAA

6,073,173

 

2,000

Houston, Texas, First Lien Combined Utility System Revenue Bonds, Series 2004A, 5.250%, 5/15/25 -

5/14 at 100.00

AAA

2,183,320

   MBIA Insured

 

5,850

Katy Independent School District, Harris, Fort Bend and Waller Counties, Texas, General Obligation

2/12 at 100.00

AAA

6,378,255

   Bonds, Series 2002A, 5.125%, 2/15/18


Virginia - 0.6% (0.4% of Total Investments)

 

1,500

Hampton, Virginia, Revenue Bonds, Convention Center Project, Series 2002, 5.125%, 1/15/28 - AMBAC

1/13 at 100.00

AAA

1,589,760

   Insured


Washington - 9.2% (6.1% of Total Investments)

 

4,945

Broadway Office Properties, King County, Washington, Lease Revenue Bonds, Washington Project,

12/12 at 100.00

AAA

5,114,663

   Series 2002, 5.000%, 12/01/31 - MBIA Insured

 

5,250

Chelan County Public Utility District 1, Washington, Hydro Consolidated System Revenue Bonds,

7/12 at 100.00

AAA

5,467,875

   Series 2002C, 5.125%, 7/01/33 - AMBAC Insured

 

2,135

Kitsap County Consolidated Housing Authority, Washington, Revenue Bonds, Bremerton Government

7/13 at 100.00

Aaa

2,266,644

   Center, Series 2003, 5.000%, 7/01/23 - MBIA Insured

 

1,935

Pierce County School District 343, Dieringer, Washington, General Obligation Refunding Bonds,

6/13 at 100.00

Aaa

2,162,266

   Series 2003, 5.250%, 12/01/17 - FGIC Insured

 

9,670

Washington, General Obligation Bonds, Series 2003D, 5.000%, 12/01/21 - MBIA Insured

6/13 at 100.00

AAA

10,452,303


West Virginia - 1.2% (0.8% of Total Investments)

 

3,000

West Virginia State Building Commission, Lease Revenue Refunding Bonds, Regional Jail and

No Opt. Call

AAA

3,459,510

   Corrections Facility, Series 1998A, 5.375%, 7/01/21 - AMBAC Insured


Wisconsin - 6.6% (4.4% of Total Investments)

 

1,190

Sun Prairie Area School District, Dane County, Wisconsin, General Obligation Bonds, Series 2004C,

3/14 at 100.00

Aaa

1,305,644

   5.250%, 3/01/24 - FSA Insured

 

4,750

Wisconsin Health and Educational Facilities Authority, Revenue Refunding Bonds, Wausau Hospital

8/08 at 102.00

AAA

5,088,960

   Inc., Series 1998A, 5.125%, 8/15/20 - AMBAC Insured

 

3,000

Wisconsin Health and Educational Facilities Authority, Revenue Bonds, Meriter Hospital Inc., Series

No Opt. Call

AAA

3,541,860

   1992A, 6.000%, 12/01/22 - FGIC Insured

 

3,600

Wisconsin Health and Educational Facilities Authority, Revenue Bonds, Wheaton Franciscan Services

8/13 at 100.00

A

3,679,848

   Inc., Series 2003A, 5.125%, 8/15/33

 

4,605

Wisconsin Health and Educational Facilities Authority, Revenue Bonds, Franciscan Sisters of

9/13 at 100.00

A-

4,790,301

   Christian Charity Healthcare Ministry, Series 2003A, 5.875%, 9/01/33


$

395,385

Total Long-Term Investments (cost $396,729,382) - 151.5%

420,607,400



Other Assets Less Liabilities - 0.4%

1,023,556


Preferred Shares, at Liquidation Value - (51.9)%

(144,000,000)


Net Assets Applicable to Common Shares - 100%

$277,630,956


  

Forward Swap Contracts outstanding at January 31, 2005:

Swap

Unrealized

Notional

Effective

Termination

Appreciation

Amount

Date(2)

Date

(Depreciation)


Agreement with Goldman Sachs dated December 6, 2004, to pay

semi-annually the notional amount multiplied by 5.324% (annualized)

and receive quarterly the notional amount multiplied by the

three-month USD-LIBOR (United States Dollar-London

Inter-Bank Offered Rates).

$5,000,000

7/11/05

7/11/25

$(220,642)

Agreement with Goldman Sachs dated December 7, 2004, to

pay semi-annually the notional amount multiplied by 5.401%

(annualized) and receive quarterly the notional amount multiplied

by the three-month USD-LIBOR (United States Dollar-London

Inter-Bank Offered Rates).

20,000,000

7/18/05

7/18/35

(1,142,634)

Agreement with Goldman Sachs dated January 10, 2005, to

pay semi-annually the notional amount multiplied by 5.251%

(annualized) and receive quarterly the notional amount multiplied

by the three-month USD-LIBOR (United States Dollar-London

Inter-Bank Offered Rates).

18,000,000

8/16/05

8/16/25

(594,682)


$(1,957,957)


  

At least 80% of the Fund's net assets are invested in municipal securities that are either covered by

Original Issue Insurance, Secondary Market Insurance or Portfolio Insurance which ensures the timely

payment of principal and interest. Up to 20% of the Fund's net assets may be invested in municipal

securities that are (i) either backed by an escrow or trust containing sufficient U.S. Government or U.S.

Government agency securities (also ensuring the timely payment of principal and interest), or (ii) municipal

bonds that are rated, at the time of investment, within the four highest grades (Baa or BBB or better by

Moody's, S&P or Fitch) or unrated but judged to be of comparable quality by the Adviser.

(1)  

All percentages shown in the Portfolio of Investments are based on net assets applicable to Common

shares unless otherwise noted.

(2)  

Effective date represents the date on which both the Fund and counterparty commence interest payment

accruals on each forward swap contract.

*  

Optional Call Provisions: Dates (month and year) and prices of the earliest optional call or redemption. There

may be other call provisions at varying prices at later dates.

**  

Ratings: Using the higher of Standard & Poor's or Moody's rating.

(PLG)  

Portion of security with an aggregate market value of $1,945,076, has been pledged to collateralize the net

payment obligations under forward swap contracts.

Income Tax Information

The following information is presented on an income tax basis. Differences between amounts for financial

statement and federal income tax purposes are primarily due to timing differences in recognizing income on

taxable market discount securities and timing differences in recognizing certain gains and losses on

security transactions.

At January 31, 2005, the cost of investments was $396,710,770.

Gross unrealized appreciation and gross unrealized depreciation of investments at January 31, 2005,

were as follows:


Gross unrealized:

   Appreciation

$23,896,630

   Depreciation

-


Net unrealized appreciation of investments

$23,896,630


Item 2. Controls and Procedures.

  1. The registrant's principal executive and principal financial officers, or persons performing similar functions, have concluded that the registrant's disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940, as amended (the "1940 Act") (17 CFR 270.30a-3(c))) are effective, as of a date within 90 days of the filing date of this report that includes the disclosure required by this paragraph, based on their evaluation of the controls and procedures required by Rule 30a-3(b) under the 1940 Act (17 CFR 270.30a-3(b)) and Rule 13a-15(b) or 15d-15(b) under the Securities Exchange Act of 1934 (17 CFR 240.13a-15(b) or 240.15d-15(b)).
  2. There were no changes in the registrant's internal control over financial reporting (as defined in Rule 30a-3(d) under the 1940 Act (17 CFR 270.30a-3(d)) that occurred during the registrant's last fiscal quarter that have materially affected, or are reasonably likely to materially affect, the registrant's internal control over financial reporting.

Item 3. Exhibits.

File as exhibits as part of this Form a separate certification for each principal executive officer and principal financial officer of the registrant as required by Rule 30a-2(a) under the 1940 Act (17 CFR 270.30a-2(a)), exactly as set forth below: EX-99 CERT Attached hereto.


SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

(Registrant)         Nuveen Insured Tax-Free Advantage Municipal Fund        

By (Signature and Title)*          /s/ Jessica R. Droeger--Vice President and Secretary        

Date         04/01/05        

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

By (Signature and Title)*         /s/ Gifford R. Zimmerman--Chief Administrative Officer (principal executive officer)        

Date         04/01/05        

By (Signature and Title)*         /s/ Stephen D. Foy--Vice President and Controller (principal financial officer)        

Date         04/01/05        

* Print the name and title of each signing officer under his or her signature.