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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,
 GFIM6D5TUBsGtowWbA+M2VPF/R/37bBz+8mNPhgWesizHEvv/ATRseHwXJyQ1giH
 aSwSTKGXI+Zc5cz2nVPJ0Q==

<SEC-DOCUMENT>0001179110-04-018608.txt : 20040923
<SEC-HEADER>0001179110-04-018608.hdr.sgml : 20040923
<ACCEPTANCE-DATETIME>20040923142705
ACCESSION NUMBER:		0001179110-04-018608
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20040921
FILED AS OF DATE:		20040923
DATE AS OF CHANGE:		20040923

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			SCHROEDER GEORGE F
		CENTRAL INDEX KEY:			0001213565

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-09998
		FILM NUMBER:		041042629

	BUSINESS ADDRESS:	
		STREET 1:		C/O LANCER CORP
		STREET 2:		6655 LANCER BLVD
		CITY:			SAN ANTONIO
		STATE:			TX
		ZIP:			78219
		BUSINESS PHONE:		2103107065

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			LANCER CORP /TX/
		CENTRAL INDEX KEY:			0000768162
		STANDARD INDUSTRIAL CLASSIFICATION:	AIR COND & WARM AIR HEATING EQUIP & COMM & INDL REFRIG EQUIP [3585]
		IRS NUMBER:				741591073
		STATE OF INCORPORATION:			TX
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		6655 LANCER BLVD
		CITY:			SAN ANTONIO
		STATE:			TX
		ZIP:			78219
		BUSINESS PHONE:		2103107000

	MAIL ADDRESS:	
		STREET 1:		6655 LANCER BLVD
		CITY:			SAN ANTONIO
		STATE:			TX
		ZIP:			78219
</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>2004-09-21</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000768162</issuerCik>
        <issuerName>LANCER CORP /TX/</issuerName>
        <issuerTradingSymbol>LAN</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001213565</rptOwnerCik>
            <rptOwnerName>SCHROEDER GEORGE F</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>6655 LANCER BLVD</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>SAN ANTONIO</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>78219</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <officerTitle></officerTitle>
            <otherText>Employee</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2004-09-21</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>I</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>4449</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>11.237</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1328633</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By 401K plan</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">Includes 4,449 shares held in a 401K plan, and 447,525 shares held by trusts for the children of Mr. Schroeder, of which Mr. Schroeder is the trustee.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Scott Adams as Attorney-in-Fact for George F. Schroeder</signatureName>
        <signatureDate>2004-09-23</signatureDate>
    </ownerSignature>
</ownershipDocument>

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