EXHIBIT 23.3



                  CONSENT OF GAFFNEY, CLINE & ASSOCIATES, INC.


As the  independent  reserve  engineers for Pioneer  Natural  Resources  Company
(Pioneer),  Gaffney, Cline & Associates,  Inc. (GCA) hereby confirms that it has
granted and not  withdrawn  its  consent to the  reference  in the  Registration
Statements (No.  333-88438,  No. 333-35087,  No. 333-35165,  No. 333-39153,  No.
333-39249,  No. 33-44851,  No. 333-35085 and No. 333-35175) on Form S-8 and (No.
333-88478,  No.  333-42315,  No.  333-44439  and No.  333-39381)  on Form S-3 as
disclosed by Pioneer in its Form 10-K submission to the United States Securities
and Exchange Commission for the year ended December 31, 2003.




                                              GAFFNEY, CLINE & ASSOCIATES, INC.




                                              By: /s/ Rawdon J.H. Seager
                                                  -----------------------------
                                                  Rawdon J.H. Seager


Houston, Texas
February 2, 2004