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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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MIC-Info: RSA-MD5,RSA,
 S0/oowbIbGeG/LKAZD4baH+A5vG5nZ/9zah136KdEqpYZ8UbsPdF8qaFkU0u2Qg/
 EPtpIlj2HtWZU181Bap7sA==

<SEC-DOCUMENT>0000873603-07-000005.txt : 20070202
<SEC-HEADER>0000873603-07-000005.hdr.sgml : 20070202
<ACCEPTANCE-DATETIME>20070202145900
ACCESSION NUMBER:		0000873603-07-000005
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20070201
FILED AS OF DATE:		20070202
DATE AS OF CHANGE:		20070202

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			EXCEL TECHNOLOGY INC
		CENTRAL INDEX KEY:			0000873603
		STANDARD INDUSTRIAL CLASSIFICATION:	MISCELLANEOUS ELECTRICAL MACHINERY, EQUIPMENT & SUPPLIES [3690]
		IRS NUMBER:				112780242
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		41 RESEARCH WAY
		CITY:			E SETUAKET
		STATE:			NY
		ZIP:			11733
		BUSINESS PHONE:		631-784-6175

	MAIL ADDRESS:	
		STREET 1:		41 RESEARCH WAY
		CITY:			EAST SETAUKET
		STATE:			NY
		ZIP:			11733

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			JAMES DONALD HILL
		CENTRAL INDEX KEY:			0001234626

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-19306
		FILM NUMBER:		07576086

	MAIL ADDRESS:	
		STREET 1:		C/O EXCEL TECHNOLOGY INC
		STREET 2:		41 RESEARCH WAY
		CITY:			E SETAUKET
		STATE:			NY
		ZIP:			11733
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2007-02-01</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000873603</issuerCik>
        <issuerName>EXCEL TECHNOLOGY INC</issuerName>
        <issuerTradingSymbol>XLTC</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001234626</rptOwnerCik>
            <rptOwnerName>JAMES DONALD HILL</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O EXCEL TECHNOLOGY INC</rptOwnerStreet1>
            <rptOwnerStreet2>41 RESEARCH WAY</rptOwnerStreet2>
            <rptOwnerCity>E SETAUKET</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>11733</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>2007-02-01</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>27000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>27.52</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>127433</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <ownerSignature>
        <signatureName>J. Donald Hill</signatureName>
        <signatureDate>2007-02-02</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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