-----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,
 K2dDMMI8OHnqI5xsTBbuoXmIb3mCSaP6emTsvf843FQSJwTLYbbWZV4PX/vx8nQG
 Rn1km5NmHh50dFR+CUqQQw==

<SEC-DOCUMENT>0000079225-04-000035.txt : 20041207
<SEC-HEADER>0000079225-04-000035.hdr.sgml : 20041207
<ACCEPTANCE-DATETIME>20041207155623
ACCESSION NUMBER:		0000079225-04-000035
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20041207
FILED AS OF DATE:		20041207
DATE AS OF CHANGE:		20041207

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			PLYMOUTH RUBBER CO INC
		CENTRAL INDEX KEY:			0000079225
		STANDARD INDUSTRIAL CLASSIFICATION:	FABRICATED RUBBER PRODUCTS, NEC [3060]
		IRS NUMBER:				041733970
		STATE OF INCORPORATION:			MA
		FISCAL YEAR END:			1127

	BUSINESS ADDRESS:	
		STREET 1:		104 REVERE ST
		CITY:			CANTON
		STATE:			MA
		ZIP:			02021
		BUSINESS PHONE:		6178280220

	MAIL ADDRESS:	
		STREET 1:		PLYMOUTH RUBBER CO INC
		STREET 2:		104 REVERE ST
		CITY:			CANTON
		STATE:			MA
		ZIP:			02021

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			KEATING MELVIN L
		CENTRAL INDEX KEY:			0001263463

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-05197
		FILM NUMBER:		041188584

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		9735339277

	MAIL ADDRESS:	
		STREET 1:		18 DRIFTWOOD DRIVE
		CITY:			LIVINGSTON
		STATE:			NJ
		ZIP:			07039
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2004-12-07</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000079225</issuerCik>
        <issuerName>PLYMOUTH RUBBER CO INC</issuerName>
        <issuerTradingSymbol>PLRB</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001263463</rptOwnerCik>
            <rptOwnerName>KEATING MELVIN L</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>18 DRIFTWOOD DRIVE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>LIVINGSTON</rptOwnerCity>
            <rptOwnerState>NJ</rptOwnerState>
            <rptOwnerZipCode>07039</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Plymouth Rubber Company Class B Common Stock $0.01 par value</value>
            </securityTitle>
            <transactionDate>
                <value>2004-12-07</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>1000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.32</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>4562</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <ownerSignature>
        <signatureName>Joseph J. Berns by Power of Attorney</signatureName>
        <signatureDate>2004-12-07</signatureDate>
    </ownerSignature>
</ownershipDocument>

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