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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 JnPIAeV6ngki4+ZqChT3WoSL2t+f5Msv79jhT06i2QD5GezOBH2s7I7m/fqNG1C7
 ESyXDa/gJjddvbd9muMn6w==

<SEC-DOCUMENT>0001205377-03-000001.txt : 20031119
<SEC-HEADER>0001205377-03-000001.hdr.sgml : 20031119
<ACCEPTANCE-DATETIME>20031119170732
ACCESSION NUMBER:		0001205377-03-000001
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20031118
FILED AS OF DATE:		20031119

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			ELSTON WILLIAM S
		CENTRAL INDEX KEY:			0001205377

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-21238
		FILM NUMBER:		031013571

	MAIL ADDRESS:	
		STREET 1:		C/O LANDSTAR SYSTEM INC
		STREET 2:		13410 SUTTON PARK DR S
		CITY:			JACKSONVILLE
		STATE:			FL
		ZIP:			32224

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			LANDSTAR SYSTEM INC
		CENTRAL INDEX KEY:			0000853816
		STANDARD INDUSTRIAL CLASSIFICATION:	TRUCKING (NO LOCAL) [4213]
		IRS NUMBER:				061313069
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1226

	BUSINESS ADDRESS:	
		STREET 1:		13410 SUTTON PARK DRIVE SOUTH
		CITY:			JACKSONVILLE
		STATE:			FL
		ZIP:			32224
		BUSINESS PHONE:		9043901234

	MAIL ADDRESS:	
		STREET 1:		LANDSTAR SYSTEM INC
		STREET 2:		13410 SUTTON PARK DRIVE SOUTH
		CITY:			JACKSONVILLE
		STATE:			FL
		ZIP:			32224
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>c0001205377d20031119f4f.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<ownershipDocument><schemaVersion>X0201</schemaVersion>    <documentType>4</documentType><periodOfReport>2003-11-18</periodOfReport><notSubjectToSection16>0</notSubjectToSection16><issuer><issuerCik>0000853816</issuerCik><issuerName>LANDSTAR SYSTEM INC</issuerName>        <issuerTradingSymbol>LSTR</issuerTradingSymbol></issuer><reportingOwner><reportingOwnerId><rptOwnerCik>0001205377</rptOwnerCik><rptOwnerName>ELSTON WILLIAM S</rptOwnerName></reportingOwnerId><reportingOwnerAddress><rptOwnerStreet1>13410 SUTTON PARK DRIVE SOUTH</rptOwnerStreet1><rptOwnerStreet2></rptOwnerStreet2><rptOwnerCity>JACKSONVILLE</rptOwnerCity><rptOwnerState>FL</rptOwnerState><rptOwnerZipCode>32224</rptOwnerZipCode><rptOwnerStateDescription></rptOwnerStateDescription></reportingOwnerAddress><reportingOwnerRelationship><isDirector>1</isDirector><isOfficer>0</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther><officerTitle></officerTitle><otherText></otherText></reportingOwnerRelationship></reportingOwner><nonDeriva
tiveTable><nonDerivativeTransaction><securityTitle><value>Common Stock</value></securityTitle><transactionDate><value>2003-11-18</value></transactionDate><deemedExecutionDate></deemedExecutionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>M</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionTimeliness><value></value></transactionTimeliness><transactionAmounts><transactionShares><value>4000</value></transactionShares><transactionPricePerShare><value>7.9805</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><postTransactionAmounts><sharesOwnedFollowingTransaction><value>5200</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value></value></natureOfOwnership></ownershipNature></nonDerivativeTransaction></nonDerivativeTable><der
ivativeTable><derivativeTransaction><securityTitle><value>Stock Options (Right to buy)</value></securityTitle><conversionOrExercisePrice><value>7.9805</value></conversionOrExercisePrice><transactionDate><value>2003-11-18</value></transactionDate><deemedExecutionDate></deemedExecutionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>M</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>4000</value></transactionShares><transactionPricePerShare><value>7.9805</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>D</value></transactionAcquiredDisposedCode></transactionAmounts><exerciseDate><value>2000-05-21</value></exerciseDate><expirationDate><value>2008-05-21</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>4000</value></underlyingSecurityShares></underlyingSecurity><postTransacti
onAmounts><sharesOwnedFollowingTransaction><value>24000</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value></value></natureOfOwnership></ownershipNature></derivativeTransaction></derivativeTable><footnotes></footnotes><ownerSignature><signatureName>James B. Gattoni, Attorney-in-fact</signatureName><signatureDate>2003-11-19</signatureDate></ownerSignature></ownershipDocument>

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</TEXT>
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</SEC-DOCUMENT>
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