-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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<SEC-DOCUMENT>0001034319-03-000003.txt : 20030530
<SEC-HEADER>0001034319-03-000003.hdr.sgml : 20030530
<ACCEPTANCE-DATETIME>20030529175215
ACCESSION NUMBER:		0001034319-03-000003
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20030528
FILED AS OF DATE:		20030530

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			PIONEER NATURAL RESOURCES CO
		CENTRAL INDEX KEY:			0001038357
		STANDARD INDUSTRIAL CLASSIFICATION:	CRUDE PETROLEUM & NATURAL GAS [1311]
		IRS NUMBER:				752702753
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		1400 WILLIAMS SQUARE WEST
		STREET 2:		5205 N OCONNOR BLVD
		CITY:			IRVING
		STATE:			TX
		ZIP:			75039
		BUSINESS PHONE:		9724449001

	MAIL ADDRESS:	
		STREET 1:		1400 WILLIAMS SQUARE WEST
		STREET 2:		5205 N OCONNOR BLVD
		CITY:			IRVING
		STATE:			TX
		ZIP:			75039

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			HOUGHTON JAMES L
		CENTRAL INDEX KEY:			0001034319

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-13245
		FILM NUMBER:		03724193

	BUSINESS ADDRESS:	
		STREET 1:		5205 N O CONNOR BLVD
		STREET 2:		SUITE 1400
		CITY:			IRVING
		STATE:			TX
		ZIP:			75039
		BUSINESS PHONE:		972-444-9001

	MAIL ADDRESS:	
		STREET 1:		5205 N O CONNOR BLVD
		STREET 2:		SUITE 1400
		CITY:			IRVING
		STATE:			TX
		ZIP:			75039
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgardoc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0101</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2003-05-28</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001038357</issuerCik>
        <issuerName>PIONEER NATURAL RESOURCES CO</issuerName>
        <issuerTradingSymbol>PXD</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001034319</rptOwnerCik>
            <rptOwnerName>HOUGHTON JAMES L</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>  </rptOwnerStreet1>
            <rptOwnerStreet2>  </rptOwnerStreet2>
            <rptOwnerCity>  </rptOwnerCity>
            <rptOwnerState>  </rptOwnerState>
            <rptOwnerZipCode>  </rptOwnerZipCode>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeSecurity>
        <securityTitle>
            <value>Common Stock</value>
        </securityTitle>
        <transactionDate>
            <value>2003-05-28</value>
        </transactionDate>
        <transactionCoding>
            <transactionFormType>4</transactionFormType>
            <transactionCode>M</transactionCode>
            <equitySwapInvolved>0</equitySwapInvolved>
        </transactionCoding>
        <transactionAmounts>
            <transactionShares>
                <value>173</value>
            </transactionShares>
            <transactionValue>
                <value>10.875</value>
            </transactionValue>
            <transactionAcquiredDisposedCode>
                <value>A</value>
            </transactionAcquiredDisposedCode>
        </transactionAmounts>
        <postTransactionAmounts>
            <sharesOwnedFollowingTransaction>
                <value>173</value>
            </sharesOwnedFollowingTransaction>
        </postTransactionAmounts>
        <ownershipNature>
            <directOrIndirectOwnership>
                <value>D</value>
            </directOrIndirectOwnership>
        </ownershipNature>
    </nonDerivativeSecurity>

    <nonDerivativeSecurity>
        <securityTitle>
            <value>Common Stock</value>
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        <transactionDate>
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            <equitySwapInvolved>0</equitySwapInvolved>
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        <transactionAmounts>
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                <value>173</value>
            </transactionShares>
            <transactionValue>
                <value>25.97</value>
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            <transactionAcquiredDisposedCode>
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    <nonDerivativeSecurity>
        <securityTitle>
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            <transactionCode>M</transactionCode>
            <equitySwapInvolved>0</equitySwapInvolved>
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        <transactionAmounts>
            <transactionShares>
                <value>2500</value>
            </transactionShares>
            <transactionValue>
                <value>10.875</value>
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        <transactionAmounts>
            <transactionShares>
                <value>2500</value>
            </transactionShares>
            <transactionValue>
                <value>25.9</value>
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    <nonDerivativeSecurity>
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                <value>2100</value>
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            <transactionValue>
                <value>10.875</value>
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            <transactionAcquiredDisposedCode>
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            <sharesOwnedFollowingTransaction>
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    <nonDerivativeSecurity>
        <securityTitle>
            <value>Common Stock</value>
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        <transactionDate>
            <value>2003-05-28</value>
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        <transactionCoding>
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            <transactionCode>S</transactionCode>
            <equitySwapInvolved>0</equitySwapInvolved>
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        <transactionAmounts>
            <transactionShares>
                <value>2100</value>
            </transactionShares>
            <transactionValue>
                <value>25.8</value>
            </transactionValue>
            <transactionAcquiredDisposedCode>
                <value>D</value>
            </transactionAcquiredDisposedCode>
        </transactionAmounts>
        <postTransactionAmounts>
            <sharesOwnedFollowingTransaction>
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    </nonDerivativeSecurity>

    <nonDerivativeSecurity>
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        <transactionDate>
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            <transactionValue>
                <value>10.875</value>
            </transactionValue>
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    <nonDerivativeSecurity>
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        <transactionDate>
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        <transactionAmounts>
            <transactionShares>
                <value>173</value>
            </transactionShares>
            <transactionValue>
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            <transactionAcquiredDisposedCode>
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    <nonDerivativeSecurity>
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        <transactionDate>
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        <transactionAmounts>
            <transactionShares>
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            </transactionShares>
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        <transactionAmounts>
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            <transactionValue>
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        <ownershipNature>
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    </nonDerivativeSecurity>

    <derivativeSecurity>
        <securityTitle>
            <value>Non-Qualified Stock Option (right to buy)</value>
        </securityTitle>
        <conversionOrExercisePrice>
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        </conversionOrExercisePrice>
        <transactionDate>
            <value>2003-05-28</value>
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            </transactionShares>
            <transactionValue>
                <value>10.875</value>
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            <transactionAcquiredDisposedCode>
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        </transactionAmounts>
        <exerciseDate>
            <value>1999-08-31</value>
        </exerciseDate>
        <expirationDate>
            <value>2005-05-31</value>
        </expirationDate>
        <underlyingSecurity>
            <underlyingSecurityTitle>
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            <valueOwnedFollowingTransaction>
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    <derivativeSecurity>
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        </securityTitle>
        <conversionOrExercisePrice>
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        </conversionOrExercisePrice>
        <transactionDate>
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                <value>2500</value>
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            <valueOwnedFollowingTransaction>
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            </valueOwnedFollowingTransaction>
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        <ownershipNature>
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    <derivativeSecurity>
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        </conversionOrExercisePrice>
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                <value>2100</value>
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        <postTransactionAmounts>
            <valueOwnedFollowingTransaction>
                <value>573</value>
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    <derivativeSecurity>
        <securityTitle>
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                <value>173</value>
            </transactionShares>
            <transactionValue>
                <value>10.875</value>
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            <transactionAcquiredDisposedCode>
                <value>D</value>
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        <exerciseDate>
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        <expirationDate>
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            <valueOwnedFollowingTransaction>
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    <derivativeSecurity>
        <securityTitle>
            <value>Non-Qualified Stock Option (right to buy)</value>
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        <conversionOrExercisePrice>
            <value>10.875</value>
        </conversionOrExercisePrice>
        <transactionDate>
            <value>2003-05-28</value>
        </transactionDate>
        <transactionCoding>
            <transactionFormType>4</transactionFormType>
            <transactionCode>M</transactionCode>
            <equitySwapInvolved>0</equitySwapInvolved>
        </transactionCoding>
        <transactionAmounts>
            <transactionShares>
                <value>400</value>
            </transactionShares>
            <transactionValue>
                <value>10.875</value>
            </transactionValue>
            <transactionAcquiredDisposedCode>
                <value>D</value>
            </transactionAcquiredDisposedCode>
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        <exerciseDate>
            <value>1999-08-31</value>
        </exerciseDate>
        <expirationDate>
            <value>2005-05-31</value>
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            <underlyingSecurityTitle>
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            </underlyingSecurityShares>
        </underlyingSecurity>
        <postTransactionAmounts>
            <valueOwnedFollowingTransaction>
                <value>0</value>
            </valueOwnedFollowingTransaction>
        </postTransactionAmounts>
        <ownershipNature>
            <directOrIndirectOwnership>
                <value>D</value>
            </directOrIndirectOwnership>
        </ownershipNature>
    </derivativeSecurity>

    <derivativeSecurity>
        <securityTitle>
            <value>Non-Qualified Stock Option (right to buy)</value>
        </securityTitle>
        <conversionOrExercisePrice>
            <value>13.5</value>
        </conversionOrExercisePrice>
        <transactionDate>
            <value>2003-05-28</value>
        </transactionDate>
        <transactionCoding>
            <transactionFormType>4</transactionFormType>
            <transactionCode>M</transactionCode>
            <equitySwapInvolved>0</equitySwapInvolved>
        </transactionCoding>
        <transactionAmounts>
            <transactionShares>
                <value>2077</value>
            </transactionShares>
            <transactionValue>
                <value>13.5</value>
            </transactionValue>
            <transactionAcquiredDisposedCode>
                <value>D</value>
            </transactionAcquiredDisposedCode>
        </transactionAmounts>
        <exerciseDate>
            <value>2000-08-18</value>
        </exerciseDate>
        <expirationDate>
            <value>2006-05-18</value>
        </expirationDate>
        <underlyingSecurity>
            <underlyingSecurityTitle>
                <value>Common Stock</value>
            </underlyingSecurityTitle>
            <underlyingSecurityShares>
                <value>2077</value>
            </underlyingSecurityShares>
        </underlyingSecurity>
        <postTransactionAmounts>
            <valueOwnedFollowingTransaction>
                <value>4153</value>
            </valueOwnedFollowingTransaction>
        </postTransactionAmounts>
        <ownershipNature>
            <directOrIndirectOwnership>
                <value>D</value>
            </directOrIndirectOwnership>
        </ownershipNature>
    </derivativeSecurity>

    <ownerSignature>
        <signatureName>By: Mark L. Withrow, Attorney-in-Fact  For: James L. Houghton</signatureName>
        <signatureDate>2003-05-29</signatureDate>
    </ownerSignature>

</ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----