-----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,
 QVTScDctFjfBxX1hyD1mCkRe2xi4VAwYyL66SMui3gF41LIFPndR2qrpkNO3XRjZ
 k7ZjYyVCVCCUaUXcWgQWpA==

<SEC-DOCUMENT>0000927946-04-000008.txt : 20040116
<SEC-HEADER>0000927946-04-000008.hdr.sgml : 20040116
<ACCEPTANCE-DATETIME>20040116144656
ACCESSION NUMBER:		0000927946-04-000008
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20000101
FILED AS OF DATE:		20040116

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			SILVON MICHAEL P
		CENTRAL INDEX KEY:			0001270189

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-23357
		FILM NUMBER:		04529507

	MAIL ADDRESS:	
		STREET 1:		3724 BROADVIEW
		CITY:			WEST LAFAYETTE
		STATE:			IN
		ZIP:			47906

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			BIOANALYTICAL SYSTEMS INC
		CENTRAL INDEX KEY:			0000720154
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-COMMERCIAL PHYSICAL & BIOLOGICAL RESEARCH [8731]
		IRS NUMBER:				351345024
		STATE OF INCORPORATION:			IN
		FISCAL YEAR END:			0930

	BUSINESS ADDRESS:	
		STREET 1:		2701 KENT AVE
		CITY:			WEST LAFAYETT
		STATE:			IN
		ZIP:			47906-1382
		BUSINESS PHONE:		3174634527

	MAIL ADDRESS:	
		STREET 1:		2701 KENT AVENUE
		CITY:			WEST LAFAYETTE
		STATE:			IN
		ZIP:			47906-1382
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>form3_ex.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<!-- - EDGAR Ease Plus 1.0                                   07/25/03  TT    -->
<ownershipDocument>
    <schemaVersion>X0201</schemaVersion>

    <documentType>3</documentType>
   <periodOfReport>2000-01-01</periodOfReport>
    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0000720154</issuerCik>
        <issuerName>BIOANALYTICAL SYSTEMS INC</issuerName>
        <issuerTradingSymbol>BASI</issuerTradingSymbol>
   </issuer>
   <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001270189</rptOwnerCik>
            <rptOwnerName>SILVON MICHAEL P</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>3724 BROADVIEW</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>WEST LAFAYETTE</rptOwnerCity>
            <rptOwnerState>IN</rptOwnerState>
            <rptOwnerZipCode>47906</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
         <isDirector>0</isDirector>
         <isOfficer>1</isOfficer>
         <isTenPercentOwner>0</isTenPercentOwner>
         <isOther>0</isOther>
         <officerTitle>Vice President</officerTitle>
      </reportingOwnerRelationship>
   </reportingOwner>
 <nonDerivativeTable>
   <nonDerivativeHolding>
      <securityTitle>
         <value>Common Shares</value>
      </securityTitle>
      <postTransactionAmounts>
         <sharesOwnedFollowingTransaction>
           <value>500</value>
         </sharesOwnedFollowingTransaction>
      </postTransactionAmounts>
      <ownershipNature>
         <directOrIndirectOwnership>
            <value>I</value>
         </directOrIndirectOwnership>
         <natureOfOwnership>
            <value>Shares owned by wife</value>
         </natureOfOwnership>
      </ownershipNature>
   </nonDerivativeHolding>
 </nonDerivativeTable>
 <derivativeTable>
   <derivativeHolding>
      <securityTitle>
         <value>Stock Options (right to buy common stock)</value>
      </securityTitle>
      <conversionOrExercisePrice>
         <value>8.00</value>
      </conversionOrExercisePrice>
      <exerciseDate>
         <value>1998-11-25</value>
            <footnoteId id="F1"/>
      </exerciseDate>
      <expirationDate>
         <value>2007-11-25</value>
      </expirationDate>
      <underlyingSecurity>
         <underlyingSecurityTitle>
           <value>Common Shares</value>
         </underlyingSecurityTitle>
         <underlyingSecurityShares>
           <value>2000</value>
         </underlyingSecurityShares>
      </underlyingSecurity>
      <ownershipNature>
         <directOrIndirectOwnership>
           <value>D</value>
         </directOrIndirectOwnership>
      </ownershipNature>
   </derivativeHolding>
   <derivativeHolding>
      <securityTitle>
         <value>Stock Options (right to buy common stock)</value>
      </securityTitle>
      <conversionOrExercisePrice>
         <value>4.25</value>
      </conversionOrExercisePrice>
      <exerciseDate>
         <value>1999-12-11</value>
            <footnoteId id="F2"/>
      </exerciseDate>
      <expirationDate>
         <value>2008-12-11</value>
      </expirationDate>
      <underlyingSecurity>
         <underlyingSecurityTitle>
           <value>Common Shares</value>
         </underlyingSecurityTitle>
         <underlyingSecurityShares>
           <value>2000</value>
         </underlyingSecurityShares>
      </underlyingSecurity>
      <ownershipNature>
         <directOrIndirectOwnership>
           <value>D</value>
         </directOrIndirectOwnership>
      </ownershipNature>
   </derivativeHolding>
 </derivativeTable>
   <footnotes>
      <footnote id="F1"> The options vest in four annual installments beginning on November 25, 1998.</footnote>

      <footnote id="F2"> The options vest in four annual installments beginning on December 11, 1999.</footnote>
   </footnotes>
   <ownerSignature>
      <signatureName>/s/ Michael P. Silvon</signatureName>
      <signatureDate>2004-01-15</signatureDate>
   </ownerSignature>
</ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----
