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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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 YiHizVEJDgUrduT3rFcjYA==

<SEC-DOCUMENT>0001179110-05-020467.txt : 20051102
<SEC-HEADER>0001179110-05-020467.hdr.sgml : 20051102
<ACCEPTANCE-DATETIME>20051102172117
ACCESSION NUMBER:		0001179110-05-020467
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20051101
FILED AS OF DATE:		20051102
DATE AS OF CHANGE:		20051102

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			BENCHMARK ELECTRONICS INC
		CENTRAL INDEX KEY:			0000863436
		STANDARD INDUSTRIAL CLASSIFICATION:	PRINTED CIRCUIT BOARDS [3672]
		IRS NUMBER:				742211011
		STATE OF INCORPORATION:			TX
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		3000 TECHNOLOGY DRIVE
		CITY:			ANGLETON
		STATE:			TX
		ZIP:			77515
		BUSINESS PHONE:		9798496550

	MAIL ADDRESS:	
		STREET 1:		3000 TECHNOLOGY DR
		CITY:			ANGLETON
		STATE:			TX
		ZIP:			77515

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			NIGBOR DONALD E
		CENTRAL INDEX KEY:			0001209586

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-10560
		FILM NUMBER:		051174178

	MAIL ADDRESS:	
		STREET 1:		BENCHMARK ELECTRONIC
		STREET 2:		3000 TECHNOLOGY DRIVE
		CITY:			ANGLETON
		STATE:			TX
		ZIP:			77515
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>FORM 4 -
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2005-11-01</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000863436</issuerCik>
        <issuerName>BENCHMARK ELECTRONICS INC</issuerName>
        <issuerTradingSymbol>BHE</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001209586</rptOwnerCik>
            <rptOwnerName>NIGBOR DONALD E</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>3000 TECHNOLOGY DRIVE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>ANGLETON</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>77515</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2005-11-01</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>G</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>7000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>199448</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">Gifts to Rensselaer Polytechnic Institute - 3,500 shares; Mayo Foundation for Medical Education and Research - 3,500 shares</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>Donald E. Nigbor</signatureName>
        <signatureDate>2005-11-02</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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