-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 JmLqxRG9O4G/izlSieUu8h85d89GyKVYK1cePBk1KKjoCajGfP/zysfxu0y1bmSz
 tAd0++qzTvg0M42PlWCeIw==

<SEC-DOCUMENT>0001238299-07-000031.txt : 20071220
<SEC-HEADER>0001238299-07-000031.hdr.sgml : 20071220
<ACCEPTANCE-DATETIME>20071220170247
ACCESSION NUMBER:		0001238299-07-000031
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20071220
FILED AS OF DATE:		20071220
DATE AS OF CHANGE:		20071220

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			UNITY BANCORP INC /NJ/
		CENTRAL INDEX KEY:			0000920427
		STANDARD INDUSTRIAL CLASSIFICATION:	STATE COMMERCIAL BANKS [6022]
		IRS NUMBER:				223282551
		STATE OF INCORPORATION:			NJ
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		64 OLD HIGHWAY 22
		CITY:			CLINTON
		STATE:			NJ
		ZIP:			08809
		BUSINESS PHONE:		9087307630

	MAIL ADDRESS:	
		STREET 1:		64 OLD HIGHWAY 22
		CITY:			CLINTON
		STATE:			NJ
		ZIP:			08809

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	UNITY BANCORP INC /DE/
		DATE OF NAME CHANGE:	19940316

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			BRODY MARK S
		CENTRAL INDEX KEY:			0001248813

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-12431
		FILM NUMBER:		071319930

	BUSINESS ADDRESS:	
		STREET 1:		C/O UNITY BANCORP INC
		STREET 2:		64 OLD HWY 22
		CITY:			CLINTON
		STATE:			NJ
		ZIP:			08809
		BUSINESS PHONE:		908-713-4306
</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>2007-12-20</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000920427</issuerCik>
        <issuerName>UNITY BANCORP INC /NJ/</issuerName>
        <issuerTradingSymbol>unty</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001248813</rptOwnerCik>
            <rptOwnerName>BRODY MARK S</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1></rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity></rptOwnerCity>
            <rptOwnerState></rptOwnerState>
            <rptOwnerZipCode></rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Stock Option (right to purchase</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>7.46</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2007-12-20</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>4000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>7.46</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2008-12-20</value>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <value>2017-12-20</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>4000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>4000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Non-qualified stock options vest one-third commencing on the first anniversary date; i.e., 1,333 on 12/20/2008; 1,333 on 12/20/2009 and 1,334 on 12/20/2010.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>Linda B. McDermott, POA</signatureName>
        <signatureDate>2007-12-20</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----