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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,
 DrufSxryPBNNeEsmn8FTsAAf944yHGuemOcmPzkXgJyH6JInoqz+EbYSIEGUcgbn
 /6Q4zsoQyJ82zCD+70jguw==

<SEC-DOCUMENT>0001228616-05-000239.txt : 20050809
<SEC-HEADER>0001228616-05-000239.hdr.sgml : 20050809
<ACCEPTANCE-DATETIME>20050809091102
ACCESSION NUMBER:		0001228616-05-000239
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20050801
FILED AS OF DATE:		20050809
DATE AS OF CHANGE:		20050809

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Hatch John R
		CENTRAL INDEX KEY:			0001335638

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	811-07590
		FILM NUMBER:		051007682

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		617-663-4441

	MAIL ADDRESS:	
		STREET 1:		C/O JOHN HANCOCK
		STREET 2:		601 CONGRESS STREET
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02210

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			HANCOCK JOHN PATRIOT PREFERRED DIVIDEND FUND
		CENTRAL INDEX KEY:			0000899581
		STANDARD INDUSTRIAL CLASSIFICATION:	UNKNOWN SIC - 0000 [0000]
		IRS NUMBER:				043190056
		STATE OF INCORPORATION:			MA
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		101 HUNTINGTON AVE
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02199-7603
		BUSINESS PHONE:		6173751702

	MAIL ADDRESS:	
		STREET 1:		JOHN HANCOCK
		STREET 2:		101 HUNTINGTON AVE
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02199-7603

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	PATRIOT PREFERRED DIVIDEND FUND
		DATE OF NAME CHANGE:	19930714
</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>2005-08-01</periodOfReport>

    <noSecuritiesOwned>1</noSecuritiesOwned>

    <issuer>
        <issuerCik>0000899581</issuerCik>
        <issuerName>HANCOCK JOHN PATRIOT PREFERRED DIVIDEND FUND</issuerName>
        <issuerTradingSymbol>PPF</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001335638</rptOwnerCik>
            <rptOwnerName>Hatch John R</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O JOHN HANCOCK</rptOwnerStreet1>
            <rptOwnerStreet2>601 CONGRESS STREET</rptOwnerStreet2>
            <rptOwnerCity>BOSTON</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02210</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>VP. the Adviser</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <ownerSignature>
        <signatureName>John Hatch</signatureName>
        <signatureDate>2005-08-03</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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