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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,
 U5Y2tVEPYIoxNHzS8c0UInhp1QMrQtPQlgRYBOOdAjfdmlQPq0Xs97h6m4eLgHpP
 eF8XK3bn+5xqgKDUVDZAAg==

<SEC-DOCUMENT>0001364037-06-000012.txt : 20060526
<SEC-HEADER>0001364037-06-000012.hdr.sgml : 20060526
<ACCEPTANCE-DATETIME>20060526115656
ACCESSION NUMBER:		0001364037-06-000012
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20060524
FILED AS OF DATE:		20060526
DATE AS OF CHANGE:		20060526

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			PUTNAM INVESTMENT GRADE MUNICIPAL TRUST
		CENTRAL INDEX KEY:			0000855048
		STANDARD INDUSTRIAL CLASSIFICATION:	UNKNOWN SIC - 0000 [0000]
		IRS NUMBER:				046629611
		STATE OF INCORPORATION:			MA
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		ONE POST OFFICE SQUARE
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02109
		BUSINESS PHONE:		6172921000

	MAIL ADDRESS:	
		STREET 1:		ONE POST OFFICE SQU
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02109

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			McNamara Francis Joseph III
		CENTRAL INDEX KEY:			0001364037

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	811-05901
		FILM NUMBER:		06869454

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		617-292-1000

	MAIL ADDRESS:	
		STREET 1:		PUTNAM INVESTMENTS
		STREET 2:		ONE POST OFFICE SQUARE
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02109
</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>2006-05-24</periodOfReport>

    <noSecuritiesOwned>1</noSecuritiesOwned>

    <issuer>
        <issuerCik>0000855048</issuerCik>
        <issuerName>PUTNAM INVESTMENT GRADE MUNICIPAL TRUST</issuerName>
        <issuerTradingSymbol>pgm</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001364037</rptOwnerCik>
            <rptOwnerName>McNamara Francis Joseph III</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>PUTNAM INVESTMENTS</rptOwnerStreet1>
            <rptOwnerStreet2>ONE POST OFFICE SQUARE</rptOwnerStreet2>
            <rptOwnerCity>BOSTON</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02109</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <officerTitle>SMD &amp; Gen'l Counsel, Putnam,</officerTitle>
            <otherText>issuer indirect parent hld co.</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <ownerSignature>
        <signatureName>Francis J. McNamara</signatureName>
        <signatureDate>2006-05-26</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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