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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,
 C6J9736vZBGO7F0qyZHY6J6NniY9A0ocEksiCNgLdAYawOI+q43Iah3YChs2rbjw
 xLwQ0t/Ueta7TUMefMlu9g==

<SEC-DOCUMENT>0000904454-03-000130.txt : 20030519
<SEC-HEADER>0000904454-03-000130.hdr.sgml : 20030519
<ACCEPTANCE-DATETIME>20030516192719
ACCESSION NUMBER:		0000904454-03-000130
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20030423
FILED AS OF DATE:		20030519

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ALIGN TECHNOLOGY INC
		CENTRAL INDEX KEY:			0001097149
		STANDARD INDUSTRIAL CLASSIFICATION:	ORTHOPEDIC, PROSTHETIC & SURGICAL APPLIANCES & SUPPLIES [3842]
		IRS NUMBER:				943267295
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		851 MARTIN AVENUE
		CITY:			SANTA CLARA
		STATE:			CA
		ZIP:			95050
		BUSINESS PHONE:		4087381500

	MAIL ADDRESS:	
		STREET 1:		851 MARTIN AVENUE
		CITY:			SANTA CLARA
		STATE:			CA
		ZIP:			95050

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			DOVEY BRIAN H
		CENTRAL INDEX KEY:			0001207786

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-32259
		FILM NUMBER:		03709481

	BUSINESS ADDRESS:	
		STREET 1:		ONE PALMER SQUARE
		CITY:			PRINCETON
		STATE:			NJ
		ZIP:			08542
		BUSINESS PHONE:		6096835656

	MAIL ADDRESS:	
		STREET 1:		ONE PALMER SQUARE
		CITY:			PRINCETON
		STATE:			NJ
		ZIP:			08542
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>
    <schemaVersion>X0101</schemaVersion>

<documentType>4</documentType><periodOfReport>2003-04-23</periodOfReport>
<issuer><issuerCik>0001097149</issuerCik>
        <issuerName>ALIGN TECHNOLOGY INC</issuerName>
<issuerTradingSymbol>ALGN</issuerTradingSymbol></issuer><reportingOwner><reportingOwnerId><rptOwnerCik>0001207786</rptOwnerCik>
            <rptOwnerName>DOVEY BRIAN H</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>  </rptOwnerStreet1>
            <rptOwnerStreet2>  </rptOwnerStreet2>
            <rptOwnerCity>  </rptOwnerCity>
            <rptOwnerState>  </rptOwnerState>
            <rptOwnerZipCode>  </rptOwnerZipCode>
        </reportingOwnerAddress>
<reportingOwnerRelationship>
<isDirector>1</isDirector><isOfficer>0</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther></reportingOwnerRelationship></reportingOwner><derivativeSecurity><securityTitle><value>Stock Option (Right to Buy)</value></securityTitle><conversionOrExercisePrice><value>6.15</value></conversionOrExercisePrice><transactionDate><value>2003-04-23</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>A</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>43000</value></transactionShares><transactionValue><value>0</value></transactionValue><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><exerciseDate><value>2004-04-23</value><footnoteId id="F1"/></exerciseDate><expirationDate><value>2013-04-23</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingS
ecurityShares><value>43000</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>430000</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value></value></natureOfOwnership></ownershipNature></derivativeSecurity><derivativeSecurity><securityTitle><value>Stock Option (Right to Buy)</value></securityTitle><conversionOrExercisePrice><value>8.84</value></conversionOrExercisePrice><transactionDate><value>2003-05-15</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>A</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>8000</value></transactionShares><transactionValue><value>0</value></transactionValue><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts>
<exerciseDate><value>2003-05-15</value><footnoteId id="F2"/></exerciseDate><expirationDate><value>2013-05-15</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>8000</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>8000</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value></value></natureOfOwnership></ownershipNature></derivativeSecurity><footnotes><footnote id="F1">Option becomes exercisable for 25% or 10,750 shares upon the first anniversary of the date of grant and the balance of the option becomes exercisable in thirty-six (36) monthly installments from the first anniversary of the date of grant.</footnote><footnote id="F2">Option is exercisable immediately on the date of grant subject to the Issuer's right of
 repurchase at the Exercise Price paid per share.  The Issuer's right of repurchase lapses at the first anniversary of the date of grant.</footnote></footnotes><ownerSignature><signatureName>Kathleen K. Schoemaker, Attorney-in-Fact</signatureName><signatureDate>2003-05-16</signatureDate></ownerSignature></ownershipDocument>

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