-----BEGIN PRIVACY-ENHANCED MESSAGE-----
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,
 HinfNbkhi5JvsUCDicrJKpDIwfW83WZHSICBIjCJskwhoGYItaDbZEbfEndIpfaW
 6ztLiFncV7zUBiZxt0JrvQ==

<SEC-DOCUMENT>0001183148-03-000005.txt : 20030521
<SEC-HEADER>0001183148-03-000005.hdr.sgml : 20030521
<ACCEPTANCE-DATETIME>20030520185212
ACCESSION NUMBER:		0001183148-03-000005
CONFORMED SUBMISSION TYPE:	4/A
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20030520
FILED AS OF DATE:		20030521

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			EMERY SIDNEY W JR
		CENTRAL INDEX KEY:			0001183148

	FILING VALUES:
		FORM TYPE:		4/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-02382
		FILM NUMBER:		03713529

	MAIL ADDRESS:	
		STREET 1:		MTS SYSTESM CORP
		STREET 2:		14000 TECHNOLOGY DR
		CITY:			EDEN PRAIRIE
		STATE:			MN
		ZIP:			55344

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MTS SYSTEMS CORP
		CENTRAL INDEX KEY:			0000068709
		STANDARD INDUSTRIAL CLASSIFICATION:	MEASURING & CONTROLLING DEVICES, NEC [3829]
		IRS NUMBER:				410908057
		STATE OF INCORPORATION:			MN
		FISCAL YEAR END:			0928

	BUSINESS ADDRESS:	
		STREET 1:		14000 TECHNOLOGY DR
		CITY:			EDEN PRAIRIE
		STATE:			MN
		ZIP:			55344-2290
		BUSINESS PHONE:		6129374000

	MAIL ADDRESS:	
		STREET 1:		14000 TECHNOLOGY DR
		CITY:			EDEN PRAIRIE
		STATE:			MN
		ZIP:			55344

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	RESEARCH INC
		DATE OF NAME CHANGE:	19670216
</SEC-HEADER>
<DOCUMENT>
<TYPE>4/A
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>
    <schemaVersion>X0101</schemaVersion>

    <documentType>4/A</documentType><periodOfReport>2003-05-20</periodOfReport><dateOfOriginalSubmission>2003-05-20</dateOfOriginalSubmission>
    <issuer>
        <issuerCik>0000068709</issuerCik>
        <issuerName>MTS SYSTEMS CORP</issuerName>
        <issuerTradingSymbol>MTSC</issuerTradingSymbol></issuer><reportingOwner><reportingOwnerId>
            <rptOwnerCik>0001183148</rptOwnerCik>
            <rptOwnerName>EMERY SIDNEY W JR</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>  </rptOwnerStreet1>
            <rptOwnerStreet2>  </rptOwnerStreet2>
            <rptOwnerCity>  </rptOwnerCity>
            <rptOwnerState>  </rptOwnerState>
            <rptOwnerZipCode>  </rptOwnerZipCode>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
<isDirector>1</isDirector><isOfficer>1</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther><officerTitle>Chairman, CEO and President</officerTitle></reportingOwnerRelationship></reportingOwner><nonDerivativeSecurity><securityTitle><value>Common Stock</value></securityTitle><transactionDate><value>2003-05-16</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>M</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>23333</value></transactionShares><transactionValue><value>7.3125</value></transactionValue><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><postTransactionAmounts><sharesOwnedFollowingTransaction><value>141201.22</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value></value></natu
reOfOwnership></ownershipNature></nonDerivativeSecurity><nonDerivativeSecurity><securityTitle><value>Common Stock</value></securityTitle><transactionDate><value>2003-05-15</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>F</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>11750</value></transactionShares><transactionValue><value>14.52</value></transactionValue><transactionAcquiredDisposedCode><value>D</value></transactionAcquiredDisposedCode></transactionAmounts><postTransactionAmounts><sharesOwnedFollowingTransaction><value>130006.115</value><footnoteId id="F1"/></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value></value></natureOfOwnership></ownershipNature></nonDerivativeSecurity><derivativeSecurity><securityTitle><value>Common Stock</value></securityTitle><
conversionOrExercisePrice><value>7.3125</value></conversionOrExercisePrice><transactionDate><value>2003-05-15</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>M</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>23333</value></transactionShares><transactionValue><value>0</value></transactionValue><transactionAcquiredDisposedCode><value>D</value></transactionAcquiredDisposedCode></transactionAmounts><exerciseDate><value>2001-01-14</value></exerciseDate><expirationDate><value>2005-07-14</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>70000</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>23333</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>
D</value></directOrIndirectOwnership><natureOfOwnership><value></value></natureOfOwnership></ownershipNature></derivativeSecurity><footnotes><footnote id="F1">Includes 554.895 shares acquired in April 2003 pursuant to the MTS Dividend Reinvestment Plan</footnote></footnotes><ownerSignature><signatureName>Sidney W. Emery, Jr., by Barbara Carpenter, POA</signatureName><signatureDate>2003-05-20</signatureDate></ownerSignature></ownershipDocument>

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</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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