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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
 Bm0SP3pPFEe+hwYUGABETDU+g74adRgDlm67SnhavQatWpRpmGSNDwn0lX9rbmNo
 EyDNXmkV6heAmMR88qFMug==

<SEC-DOCUMENT>0001209191-03-026596.txt : 20031023
<SEC-HEADER>0001209191-03-026596.hdr.sgml : 20031023
<ACCEPTANCE-DATETIME>20031023154552
ACCESSION NUMBER:		0001209191-03-026596
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20031021
FILED AS OF DATE:		20031023

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			LAPIDUS LEONARD
		CENTRAL INDEX KEY:			0001235383

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-15137
		FILM NUMBER:		03954111

	BUSINESS ADDRESS:	
		STREET 1:		3703 INGOMAR STREET
		CITY:			WASHINGTON
		STATE:			DC
		ZIP:			20015
		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>X0201</schemaVersion>    <documentType>4</documentType><periodOfReport>2003-10-21</periodOfReport><notSubjectToSection16>0</notSubjectToSection16><issuer><issuerCik>0000799166</issuerCik><issuerName>MASSBANK CORP</issuerName>        <issuerTradingSymbol>MASB</issuerTradingSymbol></issuer><reportingOwner><reportingOwnerId><rptOwnerCik>0001235383</rptOwnerCik><rptOwnerName>LAPIDUS LEONARD</rptOwnerName></reportingOwnerId><reportingOwnerAddress><rptOwnerStreet1>C/O MASSBANK CORP</rptOwnerStreet1><rptOwnerStreet2>123 HAVEN STREET</rptOwnerStreet2><rptOwnerCity>READING</rptOwnerCity><rptOwnerState>MA</rptOwnerState><rptOwnerZipCode>01867</rptOwnerZipCode><rptOwnerStateDescription></rptOwnerStateDescription></reportingOwnerAddress><reportingOwnerRelationship><isDirector>1</isDirector><isOfficer>0</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther></reportingOwnerRelationship></reportingOwner><derivativeTable><derivativeTransaction><security
Title><value>Phantom Stock</value><footnoteId id="F1" /></securityTitle><conversionOrExercisePrice><value>39.16</value></conversionOrExercisePrice><transactionDate><value>2003-10-21</value></transactionDate><deemedExecutionDate></deemedExecutionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>A</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionTimeliness><value></value></transactionTimeliness><transactionAmounts><transactionShares><value>38.3044</value></transactionShares><transactionPricePerShare><value>39.16</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><exerciseDate><footnoteId id="F2" /></exerciseDate><expirationDate><footnoteId id="F2" /></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common</value></underlyingSecurityTitle><underlyingSecurityShares><value>38.3044</value></underlyingSecurityShares></underlyingSecurit
y><postTransactionAmounts><sharesOwnedFollowingTransaction><value>1246.0086</value><footnoteId id="F3" /></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></derivativeTransaction></derivativeTable><footnotes><footnote id="F1">Cash-only security issued pursuant to the Directors'Deferred Compensation Plan</footnote><footnote id="F2">The shares of phantom stock become payable in shares of common stock of the issuer upon the reporting person attaining the age of 72, or his termination or death or upon a change of control of the issuer</footnote><footnote id="F3">Includes 9.1072 shares of MASSBANK Corp Common Stock acquired on 05/22/2003 at a price of $30.06 per share and 8.3240 shares of MASSBANK Corp Common Stock acquired on 08/13/2003 at a price of $33.14 per share pursuant to the reinvestment of dividends under the Directors' Deferred Compensation Plan</footnote></footnotes><remarks></remarks><ow
nerSignature><signatureName>Leonard Lapidus</signatureName><signatureDate>2003-10-23</signatureDate></ownerSignature></ownershipDocument>

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