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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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<SEC-DOCUMENT>0000075362-03-000218.txt : 20031208
<SEC-HEADER>0000075362-03-000218.hdr.sgml : 20031208
<ACCEPTANCE-DATETIME>20031208133944
ACCESSION NUMBER:		0000075362-03-000218
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20031205
FILED AS OF DATE:		20031208

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			STONECIPHER HARRY C
		CENTRAL INDEX KEY:			0001013062
		STANDARD INDUSTRIAL CLASSIFICATION:	AIRCRAFT [3721]
		STATE OF INCORPORATION:			MD
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-14817
		FILM NUMBER:		031042148

	BUSINESS ADDRESS:	
		STREET 1:		4973 BACOPA LANE S
		STREET 2:		#802
		CITY:			ST PETERSBURG
		STATE:			FL
		ZIP:			33715
		BUSINESS PHONE:		7278672891

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			PACCAR INC
		CENTRAL INDEX KEY:			0000075362
		STANDARD INDUSTRIAL CLASSIFICATION:	MOTOR VEHICLES & PASSENGER CAR BODIES [3711]
		IRS NUMBER:				910351110
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		PACCAR BUILDING
		STREET 2:		777 106TH AVENUE NE
		CITY:			BELLEVUE
		STATE:			WA
		ZIP:			98004
		BUSINESS PHONE:		425 468 7383

	MAIL ADDRESS:	
		STREET 1:		PACCAR BUILDING
		STREET 2:		777 106TH AVENUE NE
		CITY:			BELLEVUE
		STATE:			WA
		ZIP:			98004

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	PACIFIC CAR & FOUNDRY CO
		DATE OF NAME CHANGE:	19720707
</SEC-HEADER>
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<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
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<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>
    <schemaVersion>X0201</schemaVersion>

    <documentType>4</documentType><periodOfReport>2003-12-05</periodOfReport>
    <issuer>
        <issuerCik>0000075362</issuerCik>
        <issuerName>PACCAR INC</issuerName>
        <issuerTradingSymbol>PCAR</issuerTradingSymbol></issuer><reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001013062</rptOwnerCik>
            <rptOwnerName>STONECIPHER HARRY C</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>777 106TH AVENUE NE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>BELLEVUE</rptOwnerCity>
            <rptOwnerState>WA</rptOwnerState>
            <rptOwnerZipCode>98004</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
<isDirector>1</isDirector><isOfficer>0</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther></reportingOwnerRelationship></reportingOwner><nonDerivativeTable><nonDerivativeHolding><securityTitle><value>COMMON STOCK</value></securityTitle><postTransactionAmounts><sharesOwnedFollowingTransaction><value>7940</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value/></natureOfOwnership></ownershipNature></nonDerivativeHolding></nonDerivativeTable><derivativeTable><derivativeTransaction><securityTitle><value>PHANTOM STOCK UNITS</value></securityTitle><conversionOrExercisePrice><footnoteId id="F1"/></conversionOrExercisePrice><transactionDate><value>2003-12-05</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>J</transactionCode><equitySwapInvolved>0</equitySwapInvolved><footnoteId id="F2"/></transactionCoding><transaction
Amounts><transactionShares><value>14.47</value></transactionShares><transactionPricePerShare><value>79.23</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><exerciseDate><footnoteId id="F1"/></exerciseDate><expirationDate><footnoteId id="F1"/></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>COMMON STOCK</value><footnoteId id="F1"/></underlyingSecurityTitle><underlyingSecurityShares><value>14.47</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>5225.86</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value/></natureOfOwnership></ownershipNature></derivativeTransaction></derivativeTable><footnotes><footnote id="F1">The units are to be settled 1-for-1 in PACCAR common stock upon termination of the Reporting Person'
s status as a non-employee director.</footnote><footnote id="F2">Dividend on shares in phantom stock account under PACCAR Restricted Stock and Deferred Compensation Plan for Non-Employee Directors.</footnote></footnotes><remarks/><ownerSignature><signatureName>Harry C. Stonecipher by Janice M. D'Amato POA</signatureName><signatureDate>2003-12-08</signatureDate></ownerSignature></ownershipDocument>

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