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): June 22, 2004




                       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
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    (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)







                        PIONEER NATURAL RESOURCES COMPANY

                                TABLE OF CONTENTS


                                                                       Page

Item 5.   Other Events..............................................     3

Item 7.   Financial Statements and Exhibits

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

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

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



                                       2










                        PIONEER NATURAL RESOURCES COMPANY


Item 5.      Other Events

     On June 22, 2004,  Pioneer Natural Resources Company (the "Company") as the
Borrower; JP Morgan Chase Bank as the Administrative Agent; JP Morgan Chase Bank
and Bank of  America,  N.A.,  as the  Issuing  Banks;  Wachovia  Bank,  National
Association as the  Syndication  Agent;  Bank of America,  N.A., Bank One, N.A.,
Fleet  National  Bank  and  Wells  Fargo  Bank,  National  Association,  as  the
Co-Documentation  Agents;  and  certain  other  lenders  entered  into  a  First
Amendment,  dated as of June 9, 2004 (the "First  Amendment"),  to the Company's
$700,000,000  5-Year  Revolving  Credit  Agreement dated as of December 16, 2003
(the "Credit  Agreement").  The First  Amendment  is attached  hereto as Exhibit
99.1.

     The First Amendment  changes certain  definitions in the Credit  Agreement,
including a change to remove reference to Pioneer Natural Resources USA, Inc., a
wholly-owned  subsidiary of the Company  ("Pioneer USA"), from the definition of
"Subsidiary  Guarantor" and adds  definitions  for "First  Amendment" and "Total
Adjusted Debt". As a result of the First  Amendment,  Pioneer USA is no longer a
guarantor of the Credit Agreement.

     The  indentures  of the  Company's  senior  notes  provide  for  subsidiary
guarantees of the Company's senior notes equivalent to the subsidiary guarantees
imposed by the Credit  Agreement  as long as such  guarantee  was in  existance.
Accordingly,  the First  Amendment  removes  Pioneer USA as a  guarantor  of the
Credit  Agreement  and has the effect of removing  Pioneer USA as a guarantor of
the Company's senior notes.

Item 7.      Financial Statements and Exhibits

       (c)   Exhibits

             99.1   First Amendment to  5-Year Revolving  Credit Agreement dated
                    as of June 9,  2004 among the Company,  as the Borrower;  JP
                    Morgan Chase Bank  as the  Administrative  Agent;  JP Morgan
                    Chase Bank and Bank of America, N.A.,  as the Issuing Banks;
                    Wachovia  Bank,  National  Association  as  the  Syndication
                    Agent; Bank of America, N.A., Bank One, N.A., Fleet National
                    Bank and  Wells Fargo Bank,  National  Association,  as  the
                    Co-Documentation Agents and certain other lenders.


                                       3










                        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:  June 25, 2004           By:    /s/ Richard P. Dealy
                                    -------------------------------------------
                                    Richard P. Dealy
                                    Vice President and Chief Accounting Officer


                                       4









                        PIONEER NATURAL RESOURCES COMPANY

                                  EXHIBIT INDEX


Exhibit No.     Description

   99.1 (a)     First Amendment to 5-Year Revolving Credit Agreement dated as of
                June 9, 2004 among the Company, as the Borrower; JP Morgan Chase
                Bank as the Administrative  Agent; JP Morgan Chase Bank and Bank
                of America, N.A.,  as the Issuing Banks; Wachovia Bank, National
                Association  as the  Syndication  Agent;  Bank of America, N.A.,
                Bank One,  N.A.,  Fleet  National  Bank  and  Wells  Fargo Bank,
                National Association, as the Co-Documentation Agents and certain
                other lenders.



                                       5


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(a) filed herewith