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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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<SEC-DOCUMENT>0001239383-05-000012.txt : 20050104
<SEC-HEADER>0001239383-05-000012.hdr.sgml : 20050104
<ACCEPTANCE-DATETIME>20050104170429
ACCESSION NUMBER:		0001239383-05-000012
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20041231
FILED AS OF DATE:		20050104
DATE AS OF CHANGE:		20050104

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			TERADYNE INC
		CENTRAL INDEX KEY:			0000097210
		STANDARD INDUSTRIAL CLASSIFICATION:	INSTRUMENTS FOR MEAS & TESTING OF ELECTRICITY & ELEC SIGNALS [3825]
		IRS NUMBER:				042272148
		STATE OF INCORPORATION:			MA
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		321 HARRISON AVE
		STREET 2:		MAIL STOP H93
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02118
		BUSINESS PHONE:		6174822700

	MAIL ADDRESS:	
		STREET 1:		321 HARRISON AVENUE
		STREET 2:		H93
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02118

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			CHAMILLARD GEORGE W
		CENTRAL INDEX KEY:			0001192442

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-06462
		FILM NUMBER:		05508512

	BUSINESS ADDRESS:	
		STREET 1:		C/O VARIAN SEMICONDUCTOR EQUIPMENT
		STREET 2:		35 DORY ROAD
		CITY:			GLOUCESTER
		STATE:			MA
		ZIP:			01930
		BUSINESS PHONE:		6174223038

	MAIL ADDRESS:	
		STREET 1:		321 HARRISON AVENUE
		STREET 2:		C/O TERADYNE INC
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02118
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2004-12-31</periodOfReport>

    <issuer>
        <issuerCik>0000097210</issuerCik>
        <issuerName>TERADYNE INC</issuerName>
        <issuerTradingSymbol>TER</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001192442</rptOwnerCik>
            <rptOwnerName>CHAMILLARD GEORGE W</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>TERADYNE, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>321 HARRISON AVENUE</rptOwnerStreet2>
            <rptOwnerCity>BOSTON</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02118</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Shares</value>
            </securityTitle>
            <transactionDate>
                <value>2004-12-31</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>5</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>990</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>14.55</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>245743</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Shares acquired pursuant to Teradyne 1996 Employee Stock Purchase Plan under Section 423 of the Internal Revenue Code of 1986, as amended, in a transaction exempt under Rule 16b-3.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Eileen Casal, General Counsel, by power of attorney</signatureName>
        <signatureDate>2005-01-04</signatureDate>
    </ownerSignature>
</ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>2
<FILENAME>poachamillard.txt
<DESCRIPTION>POWER OF ATTORNEY CHAMILLARD
<TEXT>



Consent




Date:  January 31, 2003




TO WHOM IT MAY CONCERN:


I hereby authorize Teradyne, Inc.'s Chief Financial Officer,
General Counsel, Corporate Counsel, Secretary, Assistant
Secretary or Corporate Controller, or any of their respective
designees to execute and cause to be filed, on my behalf, (i)
Form 144 or any other documents to be filed pursuant to Rule
144 of the Securities Act of 1933 and any regulations
thereunder with respect to securities of Teradyne, Inc. and
(ii) Form 4 and/or Form 5, including amendments thereto or
other document required to be filed pursuant to Section 16(a)
of the Securities and Exchange Act of 1934 and any
regulations thereunder with respect to securities of
Teradyne, Inc.

This authorization shall continue until terminated in writing
by me.



Signature:/s/George W. Chamillard  Date Signed: January 31, 2003


Name Printed: George W. Chamillard



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