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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 Pjn6P+2RkB/4Y4zyrQzkKqNFl3FPxHBgRGHXvUBMzpNAMKc+RcltewONKaAXBUZV
 bI2clFrdtB0v/DYt5uIcJQ==

<SEC-DOCUMENT>0001287695-04-000345.txt : 20040818
<SEC-HEADER>0001287695-04-000345.hdr.sgml : 20040818
<ACCEPTANCE-DATETIME>20040818155624
ACCESSION NUMBER:		0001287695-04-000345
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20040812
FILED AS OF DATE:		20040818

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MUNIYIELD INSURED FUND INC
		CENTRAL INDEX KEY:			0000883412
		STANDARD INDUSTRIAL CLASSIFICATION:	UNKNOWN SIC - 0000 [0000]
		IRS NUMBER:				223165131
		STATE OF INCORPORATION:			NJ
		FISCAL YEAR END:			1031

	BUSINESS ADDRESS:	
		STREET 1:		800 SCUDDERS MILL ROAD
		CITY:			PLAINSBORO
		STATE:			NJ
		ZIP:			08530
		BUSINESS PHONE:		6092822800

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Oster Allan J
		CENTRAL INDEX KEY:			0001300743

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	811-06540
		FILM NUMBER:		04984303

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		609-282-5904

	MAIL ADDRESS:	
		STREET 1:		800 SCUDDES MILL RD
		CITY:			PLAINSBORO
		STATE:			NJ
		ZIP:			08536
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2004-08-12</periodOfReport>

    <noSecuritiesOwned>1</noSecuritiesOwned>

    <issuer>
        <issuerCik>0000883412</issuerCik>
        <issuerName>MUNIYIELD INSURED FUND INC</issuerName>
        <issuerTradingSymbol>MYI</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001300743</rptOwnerCik>
            <rptOwnerName>Oster Allan J</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>800 SCUDDES MILL RD</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>PLAINSBORO</rptOwnerCity>
            <rptOwnerState>NJ</rptOwnerState>
            <rptOwnerZipCode>08536</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Assistant Secretary</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <ownerSignature>
        <signatureName>Catherine Johnston, Power of Attorney</signatureName>
        <signatureDate>2004-08-18</signatureDate>
    </ownerSignature>
</ownershipDocument>

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