UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549


                                    FORM 8-K

                                 CURRENT REPORT
     Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934


          Date of Report (Date of earliest event reported): May 3, 2005




                        Pioneer Natural Resources Company
             ------------------------------------------------------
             (Exact name of Registrant as specified in its charter)



          Delaware                    1-13245                75-2702753
----------------------------        ------------        -------------------
(State or other jurisdiction        (Commission          (I.R.S. Employer
     of incorporation)              File Number)        Identification No.)



5205 N. O'Connor Blvd., Suite 900, Irving, Texas                75039
------------------------------------------------             ----------
   (Address of principal executive offices)                  (Zip Code)


                                 (972) 444-9001
              ----------------------------------------------------
              (Registrant's telephone number, including area code)



                                 Not applicable
          -------------------------------------------------------------
          (Former name or former address, if changed since last report)


Check  the  appropriate  box  below  if the  Form  8-K  filing  is  intended  to
simultaneously  satisfy the filing obligation of the registrant under any of the
following provisions:

| | Written communications pursuant to Rule 425 under the Securities Act (17 CFR
    230.425)
| | Soliciting material  pursuant to  Rule 14a-12 under the Exchange Act (17 CFR
    240.14a-12)
| | Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange
    Act (17 CFR 240.14d-2(b))
| | Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange
    Act (17 CFR 240.13e-4(c))








                        PIONEER NATURAL RESOURCES COMPANY

                                TABLE OF CONTENTS


                                                                        Page

Item 2.02.  Results of Operations and Financial Condition...........      3

Item 9.01.  Financial Statements and Exhibits

            (c)   Exhibits..........................................      3

Signature...........................................................      4

Exhibit Index.......................................................      5



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                        PIONEER NATURAL RESOURCES COMPANY


Item 2.02.   Results of Operations and Financial Condition

     The information in this document includes  forward-looking  statements that
are made  pursuant  to the Safe  Harbor  Provisions  of the  Private  Securities
Litigation  Reform  Act of 1995.  Forward-looking  statements  and the  business
prospects of Pioneer Natural  Resources Company (the "Company") are subject to a
number of risks and uncertainties that may cause the Company's actual results in
future periods to differ materially from the forward-looking  statements.  These
risks and uncertainties include,  among other things,  volatility of oil and gas
prices, product supply and demand, competition, government regulation or action,
international  operations  and associated  international  political and economic
instability,  litigation,  the costs and results of drilling and operations, the
Company's ability to replace reserves, implement its business plans, or complete
its  development  projects  as  scheduled,   access  to  and  cost  of  capital,
uncertainties   about   estimates  of  reserves,   quality  of  technical  data,
environmental and weather risks, acts of war or terrorism. These and other risks
are described in the Company's Annual Report on Form 10-K and Quarterly  Reports
on Form 10-Q that are available from the Company or the United States Securities
and Exchange Commission.

     On May 3, 2005, the Company issued a news release with financial statements
and schedules that are attached hereto as exhibit 99.1. In the news release, the
Company  announced  financial and operating  results for the quarter ended March
31,  2005,  provided an  operations  update and provided  the  Company's  second
quarter 2005 financial outlook based on current expectations.

Item 9.01.   Financial Statements and Exhibits

     (c)     Exhibits

             99.1  News Release and Schedules Attached to News Release dated
                   May 3, 2005.



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                        PIONEER NATURAL RESOURCES COMPANY

                                S I G N A T U R E


     Pursuant to the  requirements  of the Securities  Exchange Act of 1934, the
Registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned hereunto duly authorized.

                                PIONEER NATURAL  RESOURCES COMPANY



 Date: May 4, 2005              By:   /s/ Darin G. Holderness
                                   --------------------------------------------
                                   Darin G. Holderness
                                   Vice President and Chief Accounting Officer



                                       4








                        PIONEER NATURAL RESOURCES COMPANY

                                  EXHIBIT INDEX



Exhibit No.        Description
-----------        -----------

  99.1(a)          News Release and  Schedules  Attached to News Release dated
                   May 3, 2005.


-------------
(a) filed herewith



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