-----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,
 TavvRAbF5MgZ4TSQb7DCbP++XgMC4uy8jKDGN8eNTYUorIXU7E4/7Kvp+BKLeDYI
 JmBsNN/NmIVKSjQDsMe1bQ==

<SEC-DOCUMENT>0001209191-03-012283.txt : 20030717
<SEC-HEADER>0001209191-03-012283.hdr.sgml : 20030717
<ACCEPTANCE-DATETIME>20030717160756
ACCESSION NUMBER:		0001209191-03-012283
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20030715
FILED AS OF DATE:		20030717

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			BUFFERD ALLAN S
		CENTRAL INDEX KEY:			0001235354

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-15137
		FILM NUMBER:		03791392

	BUSINESS ADDRESS:	
		STREET 1:		8 WHITNEY ROAD
		CITY:			NEWTON
		STATE:			MA
		ZIP:			02160
		BUSINESS PHONE:		781 942 8120

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MASSBANK CORP
		CENTRAL INDEX KEY:			0000799166
		STANDARD INDUSTRIAL CLASSIFICATION:	STATE COMMERCIAL BANKS [6022]
		IRS NUMBER:				042930382
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		123 HAVEN STREET
		CITY:			READING
		STATE:			MA
		ZIP:			01867
		BUSINESS PHONE:		6179428192

	MAIL ADDRESS:	
		STREET 1:		123 HAVEN STREET
		CITY:			READING
		STATE:			PA
		ZIP:			01867
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc4.xml
<DESCRIPTION>FORM 4 SUBMISSION
<TEXT>
<XML>
<?xml version="1.0"?><ownershipDocument>
    <schemaVersion>X0101</schemaVersion>

    <documentType>4</documentType><periodOfReport>2003-07-15</periodOfReport><notSubjectToSection16>0</notSubjectToSection16>
    <issuer>
        <issuerCik>0000799166</issuerCik>
        <issuerName>MASSBANK CORP</issuerName>
        <issuerTradingSymbol>MASB</issuerTradingSymbol></issuer><reportingOwner><reportingOwnerId>
            <rptOwnerCik>0001235354</rptOwnerCik>
            <rptOwnerName>BUFFERD ALLAN S</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>  </rptOwnerStreet1>
            <rptOwnerStreet2>  </rptOwnerStreet2>
            <rptOwnerCity>  </rptOwnerCity>
            <rptOwnerState>  </rptOwnerState>
            <rptOwnerZipCode>  </rptOwnerZipCode>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
<isDirector>1</isDirector><isOfficer>0</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther></reportingOwnerRelationship></reportingOwner><derivativeSecurity><securityTitle><value>Deferred Compensation</value><footnoteId id="F1" /></securityTitle><conversionOrExercisePrice><value>36.7</value></conversionOrExercisePrice><transactionDate><value>2003-07-15</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>A</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionTimeliness><value></value></transactionTimeliness><transactionAmounts><transactionShares><value>20.436</value></transactionShares><transactionValue><value>36.7</value></transactionValue><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><exerciseDate><value>2003-07-15</value></exerciseDate><expirationDate><value>2003-07-15</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><val
ue>Common</value></underlyingSecurityTitle><underlyingSecurityShares><value>20.436</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>1175.5674</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></derivativeSecurity><footnotes><footnote id="F1">Cash-only security issued pursuant to the Directors' Deferred Compensation Plan</footnote></footnotes><ownerSignature><signatureName>David F. Carroll, Attorney-In-Fact
for Allan S. Bufferd</signatureName><signatureDate>2003-07-17</signatureDate></ownerSignature></ownershipDocument>

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