-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 CtLzhS9T5teawCKT8Tez1JfqH9biPVcl/9U20xBBEFTxzjgNhTa1VHW2yN2Hpx2K
 rptdx9RiBMTsRV85UHDPTQ==

<SEC-DOCUMENT>0001179110-06-023055.txt : 20061207
<SEC-HEADER>0001179110-06-023055.hdr.sgml : 20061207
<ACCEPTANCE-DATETIME>20061207174717
ACCESSION NUMBER:		0001179110-06-023055
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20061205
FILED AS OF DATE:		20061207
DATE AS OF CHANGE:		20061207

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			HERSH MITCHELL E
		CENTRAL INDEX KEY:			0001051538

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-13274
		FILM NUMBER:		061263664

	BUSINESS ADDRESS:	
		STREET 1:		C/O MACK-CALI REALTY CORP
		STREET 2:		11 COMMERCE DRIVE
		CITY:			CRANFORD
		STATE:			NJ
		ZIP:			07016

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MACK CALI REALTY CORP
		CENTRAL INDEX KEY:			0000924901
		STANDARD INDUSTRIAL CLASSIFICATION:	REAL ESTATE INVESTMENT TRUSTS [6798]
		IRS NUMBER:				223305147
		STATE OF INCORPORATION:			MD
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		343 THORNALL STREET
		CITY:			EDISON
		STATE:			NJ
		ZIP:			08837-2206
		BUSINESS PHONE:		7325901000

	MAIL ADDRESS:	
		STREET 1:		343 THORNALL STREET
		CITY:			EDISON
		STATE:			NJ
		ZIP:			08837-2206

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	CALI REALTY CORP /NEW/
		DATE OF NAME CHANGE:	19960730

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	CALI REALTY L P
		DATE OF NAME CHANGE:	19941025

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	CALI REALTY CORP
		DATE OF NAME CHANGE:	19940608
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>FORM 4 -
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2006-12-05</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000924901</issuerCik>
        <issuerName>MACK CALI REALTY CORP</issuerName>
        <issuerTradingSymbol>CLI</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001051538</rptOwnerCik>
            <rptOwnerName>HERSH MITCHELL E</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O MACK-CALI REALTY CORPORATION</rptOwnerStreet1>
            <rptOwnerStreet2>343 THORNALL STREET</rptOwnerStreet2>
            <rptOwnerCity>EDISON</rptOwnerCity>
            <rptOwnerState>NJ</rptOwnerState>
            <rptOwnerZipCode>08837</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>President and CEO</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2006-12-05</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>23222</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>186284</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">On December 5, 2006, the reporting person was granted: (i) 15,000 restricted shares of common stock pursuant to the 2000 Employee Stock Option Plan of Mack-Cali Realty Corporation, which shares shall be fully vested upon issuance and shall be subject to a six month restriction on transfer, and (ii) 8,222 restricted shares of common stock pursuant to the 2000 Employee Stock Option Plan of Mack-Cali Realty Corporation, which shares shall vest in two, equal, annual installments on January 1, 2007 and January 1, 2008, and solely with respect to the shares that will vest on January 1, 2007, shall be subject to a six month restriction on transfer.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Mitchell E. Hersh</signatureName>
        <signatureDate>2006-12-07</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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