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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,
 VvNrgtCuG88czJ9BtxBOZfSmY40wBjLuKPpX8JYkV9SYq1BbpLqzj4DoF05G8EWO
 3XOFBgX0qdzH4UuihrB8Pw==

<SEC-DOCUMENT>0001181431-04-001402.txt : 20040106
<SEC-HEADER>0001181431-04-001402.hdr.sgml : 20040106
<ACCEPTANCE-DATETIME>20040106164607
ACCESSION NUMBER:		0001181431-04-001402
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20040102
FILED AS OF DATE:		20040106

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			VANDERVELDE BERT
		CENTRAL INDEX KEY:			0001210235

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-49804
		FILM NUMBER:		04510710

	MAIL ADDRESS:	
		STREET 1:		1350 BORDEAUX DRIVE
		CITY:			SUNNYVALE
		STATE:			CA
		ZIP:			94089

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			KYPHON INC
		CENTRAL INDEX KEY:			0001123313
		STANDARD INDUSTRIAL CLASSIFICATION:	SURGICAL & MEDICAL INSTRUMENTS & APPARATUS [3841]
		IRS NUMBER:				770366069
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		1350 BORDEAUX DR
		CITY:			SUNNYVALE
		STATE:			CA
		ZIP:			94089
		BUSINESS PHONE:		4085486500
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>rrd28057.xml
<DESCRIPTION>10B5-1 SALE ON 1/2/04
<TEXT>
<XML>
<?xml version="1.0"?><ownershipDocument>
    <schemaVersion>X0201</schemaVersion>

    <documentType>4</documentType><periodOfReport>2004-01-02</periodOfReport><notSubjectToSection16>0</notSubjectToSection16>
    <issuer>
        <issuerCik>0001123313</issuerCik>
        <issuerName>KYPHON INC</issuerName>
        <issuerTradingSymbol>KYPH</issuerTradingSymbol></issuer><reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001210235</rptOwnerCik>
            <rptOwnerName>VANDERVELDE BERT</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>KYPHON INC.</rptOwnerStreet1>
            <rptOwnerStreet2>1350 BORDEAUX DRIVE</rptOwnerStreet2>
            <rptOwnerCity>SUNNYVALE</rptOwnerCity>
            <rptOwnerState></rptOwnerState>
            <rptOwnerZipCode>94089</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
<isDirector>0</isDirector><isOfficer>1</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther><officerTitle>VP, General Manager (Europe)</officerTitle></reportingOwnerRelationship></reportingOwner><nonDerivativeTable><nonDerivativeTransaction><securityTitle><value>Common Stock</value></securityTitle><transactionDate><value>2004-01-02</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>S</transactionCode><equitySwapInvolved>0</equitySwapInvolved><footnoteId id="F1"/></transactionCoding><transactionAmounts><transactionShares><value>935</value></transactionShares><transactionPricePerShare><value>24.8920</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>D</value></transactionAcquiredDisposedCode></transactionAmounts><postTransactionAmounts><sharesOwnedFollowingTransaction><value>58251</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIn
directOwnership></ownershipNature></nonDerivativeTransaction></nonDerivativeTable><footnotes><footnote id="F1">Sale made pursuant to a 10b5-1 Trading Plan.</footnote></footnotes><ownerSignature><signatureName>Jeffrey L. Kaiser, Attorney-In-Fact</signatureName><signatureDate>2004-01-06</signatureDate></ownerSignature></ownershipDocument>



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