-----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,
 RKzDSftGbKPmfTY2w7s3EQtV4G6L8GDPNFeuXgnG4Laz6moqbODJnyres1bYs8CP
 JzQ/Kr3HZnt3yzIwvnoDFQ==

<SEC-DOCUMENT>0001209191-03-029456.txt : 20031110
<SEC-HEADER>0001209191-03-029456.hdr.sgml : 20031110
<ACCEPTANCE-DATETIME>20031110122231
ACCESSION NUMBER:		0001209191-03-029456
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20031107
FILED AS OF DATE:		20031110

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			PLUSH MARK J
		CENTRAL INDEX KEY:			0001198942

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-09965
		FILM NUMBER:		03987325

	MAIL ADDRESS:	
		STREET 1:		KEITHLEY INSTRUMENTS INC
		STREET 2:		28775 AURORA RD
		CITY:			CLEVELAND
		STATE:			OH
		ZIP:			44139

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			KEITHLEY INSTRUMENTS INC
		CENTRAL INDEX KEY:			0000054991
		STANDARD INDUSTRIAL CLASSIFICATION:	INSTRUMENTS FOR MEAS & TESTING OF ELECTRICITY & ELEC SIGNALS [3825]
		IRS NUMBER:				340794417
		STATE OF INCORPORATION:			OH
		FISCAL YEAR END:			0930

	BUSINESS ADDRESS:	
		STREET 1:		28775 AURORA RD
		CITY:			SOLON
		STATE:			OH
		ZIP:			44139
		BUSINESS PHONE:		2162480400
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc4.xml
<DESCRIPTION>FORM 4 SUBMISSION
<TEXT>
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resOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></derivativeHolding><derivativeHolding><securityTitle><value>Common Share Option</value></securityTitle><conversionOrExercisePrice><value>45.1250</value></conversionOrExercisePrice><exerciseDate><value>2002-08-02</value></exerciseDate><expirationDate><value>2010-08-01</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Shares</value></underlyingSecurityTitle><underlyingSecurityShares><value>42000.0000</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>42000.0000</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></derivativeHolding><derivativeHolding><securityTitle><value>Common Share Option</value></securityTitle><conversionOrExercise
Price><value>18.4100</value></conversionOrExercisePrice><exerciseDate><value>2003-07-25</value><footnoteId id="F4" /></exerciseDate><expirationDate><value>2011-07-24</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Shares</value></underlyingSecurityTitle><underlyingSecurityShares><value>38000.0000</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>38000.0000</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></derivativeHolding><derivativeHolding><securityTitle><value>Common Share Option</value></securityTitle><conversionOrExercisePrice><value>13.7600</value></conversionOrExercisePrice><exerciseDate><value>2004-07-24</value><footnoteId id="F4" /></exerciseDate><expirationDate><value>2012-07-23</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Shares</value>
</underlyingSecurityTitle><underlyingSecurityShares><value>35000.0000</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>35000.0000</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></derivativeHolding><derivativeHolding><securityTitle><value>Common Share Option</value></securityTitle><conversionOrExercisePrice><value>16.1200</value></conversionOrExercisePrice><exerciseDate><value>2005-07-19</value><footnoteId id="F4" /></exerciseDate><expirationDate><value>2013-07-18</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Shares</value></underlyingSecurityTitle><underlyingSecurityShares><value>33000.0000</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>33000.0000</value></sharesOwnedFollowingTransaction></postTransactionAmoun
ts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></derivativeHolding></derivativeTable><footnotes><footnote id="F1">Restricted Shares will become fully vested on June 1, 2011</footnote><footnote id="F2">Martin J. Plush Trust, Virginia A. Plush Trustee</footnote><footnote id="F3">Christopher M. Plush Trust, Virginia A. Plush Trustee</footnote><footnote id="F4">Date reported applies to 50% of total, one-half of the balance is then exercisable in each succeeding year.</footnote></footnotes><remarks></remarks><ownerSignature><signatureName>Mark J. Plush</signatureName><signatureDate>2003-11-10</signatureDate></ownerSignature></ownershipDocument>

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