-----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,
 BzegO3NOripjh735LWhwg4BQzKVIXAkJEyZv1xD8x2arrCKgzplZ+X9oyrLvSAYJ
 N0xuGB8yifHovEys/fEdkg==

<SEC-DOCUMENT>0001225208-09-014184.txt : 20090615
<SEC-HEADER>0001225208-09-014184.hdr.sgml : 20090615
<ACCEPTANCE-DATETIME>20090615160307
ACCESSION NUMBER:		0001225208-09-014184
CONFORMED SUBMISSION TYPE:	4/A
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20071026
FILED AS OF DATE:		20090615
DATE AS OF CHANGE:		20090615

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Spalding Thomas C Jr
		CENTRAL INDEX KEY:			0001189653

	FILING VALUES:
		FORM TYPE:		4/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	811-06040
		FILM NUMBER:		09892043

	MAIL ADDRESS:	
		STREET 1:		333 W WACKER DRIVE
		STREET 2:		C/O NUVEEN INVESTMENTS
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60606

	FORMER NAME:	
		FORMER CONFORMED NAME:	SPALDIGG THOMAS C JR
		DATE OF NAME CHANGE:	20020916

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			NUVEEN MUNICIPAL MARKET OPPORTUNITY FUND INC
		CENTRAL INDEX KEY:			0000860188
		IRS NUMBER:				363689957
		STATE OF INCORPORATION:			MN
		FISCAL YEAR END:			1031

	BUSINESS ADDRESS:	
		STREET 1:		333 W WACKER DR
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60606
		BUSINESS PHONE:		3129178200

	MAIL ADDRESS:	
		STREET 1:		333 W WACKER
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60606
</SEC-HEADER>
<DOCUMENT>
<TYPE>4/A
<SEQUENCE>1
<FILENAME>doc4a.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4/A</documentType>

    <periodOfReport>2007-10-26</periodOfReport>

    <dateOfOriginalSubmission>2009-06-02</dateOfOriginalSubmission>

    <issuer>
        <issuerCik>0000860188</issuerCik>
        <issuerName>NUVEEN MUNICIPAL MARKET OPPORTUNITY FUND INC</issuerName>
        <issuerTradingSymbol>NMO</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001189653</rptOwnerCik>
            <rptOwnerName>Spalding Thomas C Jr</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>333 W. WACKER DRIVE</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 2900</rptOwnerStreet2>
            <rptOwnerCity>CHICAGO</rptOwnerCity>
            <rptOwnerState>IL</rptOwnerState>
            <rptOwnerZipCode>60606</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isOfficer>1</isOfficer>
            <officerTitle>V.P. &amp; Portfolio Manager</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2007-10-26</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>2500</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>13.5</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>30500</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">This filing was made in error, the original transaction was reported on 4/9/2008.  We have amended this form to reflect the current balance.</footnote>
    </footnotes>

    <remarks>spaldingpoa.TXT</remarks>

    <ownerSignature>
        <signatureName>Kevin J. McCarthy/ Signed Under POA</signatureName>
        <signatureDate>2009-06-15</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----