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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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<SEC-DOCUMENT>0000884905-04-000014.txt : 20040106
<SEC-HEADER>0000884905-04-000014.hdr.sgml : 20040106
<ACCEPTANCE-DATETIME>20040106165415
ACCESSION NUMBER:		0000884905-04-000014
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20040105
FILED AS OF DATE:		20040106

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			VON KRANNICHFELDT THOMAS W
		CENTRAL INDEX KEY:			0001190783

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-11037
		FILM NUMBER:		04510776

	MAIL ADDRESS:	
		STREET 1:		39 OLD RIDGEBURY ROAD
		CITY:			DANBURY
		STATE:			CT
		ZIP:			06810-5113

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			PRAXAIR INC
		CENTRAL INDEX KEY:			0000884905
		STANDARD INDUSTRIAL CLASSIFICATION:	INDUSTRIAL INORGANIC CHEMICALS [2810]
		IRS NUMBER:				061249050
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		39 OLD RIDGEBURY RD
		CITY:			DANBURY
		STATE:			CT
		ZIP:			06810-5113
		BUSINESS PHONE:		2038372000

	MAIL ADDRESS:	
		STREET 1:		39 OLD RIDGEBURY ROAD
		CITY:			DANBURY
		STATE:			CT
		ZIP:			06810-5113

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	UNION CARBIDE INDUSTRIAL GASES INC
		DATE OF NAME CHANGE:	19600201
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
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<?xml version="1.0"?>
<ownershipDocument>
    <schemaVersion>X0201</schemaVersion>

    <documentType>4</documentType><periodOfReport>2004-01-05</periodOfReport><notSubjectToSection16>1</notSubjectToSection16>
    <issuer>
        <issuerCik>0000884905</issuerCik>
        <issuerName>PRAXAIR INC</issuerName>
        <issuerTradingSymbol>PX</issuerTradingSymbol></issuer><reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001190783</rptOwnerCik>
            <rptOwnerName>VON KRANNICHFELDT THOMAS W</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>39 OLD RIDGEBURY ROAD</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>DANBURY</rptOwnerCity>
            <rptOwnerState>CT</rptOwnerState>
            <rptOwnerZipCode>06810-5113</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
<isDirector>0</isDirector><isOfficer>1</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther><officerTitle>Vice President (Retired)</officerTitle></reportingOwnerRelationship></reportingOwner><nonDerivativeTable><nonDerivativeTransaction><securityTitle><value>Common Stock</value></securityTitle><transactionDate><value>2004-01-05</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>M</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>4209.524</value></transactionShares><transactionPricePerShare><value>38.11</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><postTransactionAmounts><sharesOwnedFollowingTransaction><value>6648.4354</value><footnoteId id="F1"/></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directO
rIndirectOwnership><natureOfOwnership><value/></natureOfOwnership></ownershipNature></nonDerivativeTransaction><nonDerivativeTransaction><securityTitle><value>Common Stock</value></securityTitle><transactionDate><value>2004-01-05</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>F</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>1262.857</value></transactionShares><transactionPricePerShare><value>38.11</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>D</value></transactionAcquiredDisposedCode></transactionAmounts><postTransactionAmounts><sharesOwnedFollowingTransaction><value>5385.5784</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value/></natureOfOwnership></ownershipNature></nonDerivativeTransaction></nonDerivativeTable><deriva
tiveTable><derivativeTransaction><securityTitle><value>Phantom Stock Units</value><footnoteId id="F2"/></securityTitle><conversionOrExercisePrice><value>0</value><footnoteId id="F3"/></conversionOrExercisePrice><transactionDate><value>2004-01-05</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>M</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>4209.524</value></transactionShares><transactionPricePerShare><value>38.11</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>D</value></transactionAcquiredDisposedCode></transactionAmounts><exerciseDate><footnoteId id="F4"/></exerciseDate><expirationDate><footnoteId id="F4"/></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>4209.524</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOw
nedFollowingTransaction><value>23793.19</value><footnoteId id="F5"/></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value/></natureOfOwnership></ownershipNature></derivativeTransaction></derivativeTable><footnotes><footnote id="F1">On December 15, 2003, the Common Stock of Praxair, Inc. split 2-for-1, resulting in the doubling of the reporting person's Common Stock holdings.</footnote><footnote id="F2">Conversion of phantom stock units deferred under the 1993 Praxair, Inc. Compensation Deferral Program as amended and are to be settled in Praxair Common Stock.</footnote><footnote id="F3">Conversion to Praxair Common Stock is on a 1-for-1 basis.</footnote><footnote id="F4">See Note (2) above.</footnote><footnote id="F5">On December 15, 2003, the Common Stock of Praxair, Inc. split 2-for-1, resulting in the doubling of the reporting person's phantom stock units.</footnote></footnotes><remarks/>
<ownerSignature><signatureName>Mark S. Lyon, Attorney-in-Fact</signatureName><signatureDate>2004-01-06</signatureDate></ownerSignature></ownershipDocument>

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