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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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<SEC-DOCUMENT>0001262067-06-000134.txt : 20061208
<SEC-HEADER>0001262067-06-000134.hdr.sgml : 20061208
<ACCEPTANCE-DATETIME>20061208194636
ACCESSION NUMBER:		0001262067-06-000134
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20061208
FILED AS OF DATE:		20061208
DATE AS OF CHANGE:		20061208

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			SYNOPSYS INC
		CENTRAL INDEX KEY:			0000883241
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-PREPACKAGED SOFTWARE [7372]
		IRS NUMBER:				561546236
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1029

	BUSINESS ADDRESS:	
		STREET 1:		700 E MIDDLEFIELD RD
		CITY:			MOUNTAIN VIEW
		STATE:			CA
		ZIP:			94043-4033
		BUSINESS PHONE:		6509625000

	MAIL ADDRESS:	
		STREET 1:		700 E MIDDLEFIELD RD
		CITY:			MOUNTAIN VIEW
		STATE:			CA
		ZIP:			94043-4033

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			CHILTON JOHN E
		CENTRAL INDEX KEY:			0001261472

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-19807
		FILM NUMBER:		061266886

	MAIL ADDRESS:	
		STREET 1:		700 EAST MIDDLEFIELD ROAD
		CITY:			MOUNTAIN VIEW
		STATE:			CA
		ZIP:			9403
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgardoc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
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            <officerTitle>Sr. VP &amp; GM</officerTitle>
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    <footnotes>
        <footnote id="F1">3/48ths of the option becomes exercisable on the date shown followed by 45 equal monthly installments</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>By: Stephen Buckhout pursuant to POA  For: John Chilton</signatureName>
        <signatureDate>2006-12-08</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----