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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
 VpTO132gf8J/t+uNa5tNiWXtdlP9nhe/9GmfeielDglICEHFzH5k7lnU24KjJEph
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<SEC-DOCUMENT>0001204432-04-000024.txt : 20040419
<SEC-HEADER>0001204432-04-000024.hdr.sgml : 20040419
<ACCEPTANCE-DATETIME>20040419205551
ACCESSION NUMBER:		0001204432-04-000024
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20040416
FILED AS OF DATE:		20040419

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			JUNIPER NETWORKS INC
		CENTRAL INDEX KEY:			0001043604
		STANDARD INDUSTRIAL CLASSIFICATION:	COMPUTER COMMUNICATIONS EQUIPMENT [3576]
		IRS NUMBER:				770422528
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		1194 NORTH MATHILDA AVE
		CITY:			SUNNYVALE
		STATE:			CA
		ZIP:			94089
		BUSINESS PHONE:		6505268000

	MAIL ADDRESS:	
		STREET 1:		1194 NORTH MATHILDA AVE
		CITY:			SUNNYVALE
		STATE:			CA
		ZIP:			94089

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			HEARST WILLIAM R III
		CENTRAL INDEX KEY:			0001219612

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-26339
		FILM NUMBER:		04741607

	BUSINESS ADDRESS:	
		STREET 1:		2750 SAND HILL ROAD
		CITY:			MENLO PARK
		STATE:			CA
		ZIP:			94025
		BUSINESS PHONE:		6502333394

	MAIL ADDRESS:	
		STREET 1:		2750 SAND HILL ROAD
		CITY:			MENLO PARK
		STATE:			CA
		ZIP:			94025
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgardoc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0201</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2004-04-16</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001043604</issuerCik>
        <issuerName>JUNIPER NETWORKS INC</issuerName>
        <issuerTradingSymbol>JNPR</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001219612</rptOwnerCik>
            <rptOwnerName>HEARST WILLIAM R III</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O KLEINER PERKINS CAULFIELD &amp; BYERS</rptOwnerStreet1>
            <rptOwnerStreet2>2750 SAND HILL ROAD</rptOwnerStreet2>
            <rptOwnerCity>MENLO PARK</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>94025</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2004-04-16</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>24285</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1030303</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Received in exchange for 17,297 shares of Netscreen Technologies, Inc. common stock in connection with the merger of Netscreen Technologies into Juniper Networks, Inc. (the &quot;Merger&quot;).  On the effective date of the Merger, the closing price of Netscreen Tehnology Inc.'s common stock was  $35.11 and the closing price of Juniper Networks, Inc.'s common stock was $25.17.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>By: Mitchell L. Gaynor, attorney-in-fact  For: William R. Hearst, III</signatureName>
        <signatureDate>2004-04-19</signatureDate>
    </ownerSignature>
</ownershipDocument>

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</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----