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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 GUEMdafZdG3o2r9hnGlcFsSNnYLqETnYQQ4YUongq5jRRQLb2VrrREeJ/7vmzPBV
 VpVN4Vzkml2ZHSS/P/mLDw==

<SEC-DOCUMENT>0000874443-07-000001.txt : 20070430
<SEC-HEADER>0000874443-07-000001.hdr.sgml : 20070430
<ACCEPTANCE-DATETIME>20070430181325
ACCESSION NUMBER:		0000874443-07-000001
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20070423
FILED AS OF DATE:		20070430
DATE AS OF CHANGE:		20070430

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			PFEFFER MATTHEW J
		CENTRAL INDEX KEY:			0001192063

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-19222
		FILM NUMBER:		07802455

	BUSINESS ADDRESS:	
		STREET 1:		C/O CELL GENESYS
		STREET 2:		342 LAKESIDE DRIVE
		CITY:			FOSTER CITY
		STATE:			CA
		ZIP:			94404

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			GENELABS TECHNOLOGIES INC /CA
		CENTRAL INDEX KEY:			0000874443
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				943010150
		STATE OF INCORPORATION:			CA
		FISCAL YEAR END:			0107

	BUSINESS ADDRESS:	
		STREET 1:		505 PENOBSCOT DR
		CITY:			REDWOOD CITY
		STATE:			CA
		ZIP:			94063
		BUSINESS PHONE:		6503969500

	MAIL ADDRESS:	
		STREET 1:		505 PENOBSCOT DR
		CITY:			REDWOOD CITY
		STATE:			CA
		ZIP:			94063
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2007-04-23</periodOfReport>

    <noSecuritiesOwned>1</noSecuritiesOwned>

    <issuer>
        <issuerCik>0000874443</issuerCik>
        <issuerName>GENELABS TECHNOLOGIES INC /CA</issuerName>
        <issuerTradingSymbol>gnlb</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001192063</rptOwnerCik>
            <rptOwnerName>PFEFFER MATTHEW J</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1></rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity></rptOwnerCity>
            <rptOwnerState></rptOwnerState>
            <rptOwnerZipCode></rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <ownerSignature>
        <signatureName>James A.D. Smith ( His Attorney in Fact)</signatureName>
        <signatureDate>2007-04-30</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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