<?xml version="1.0"?>
<ownershipDocument>
    <schemaVersion>X0201</schemaVersion>

    <documentType>4</documentType>
	<periodOfReport>2004-01-01</periodOfReport>
	<notSubjectToSection16>0</notSubjectToSection16>
    <issuer>
        <issuerCik>0000310158</issuerCik>
        <issuerName>SCHERING PLOUGH CORP</issuerName>
        <issuerTradingSymbol>SGP</issuerTradingSymbol>
	</issuer>
	<reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001023219</rptOwnerCik>
            <rptOwnerName>RUSSO PATRICIA F</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>SCHERING-PLOUGH CORPORATION</rptOwnerStreet1>
            <rptOwnerStreet2>2000 GALLOPING HILL ROAD</rptOwnerStreet2>
            <rptOwnerCity>KENILWORTH</rptOwnerCity>
            <rptOwnerState>NJ</rptOwnerState>
            <rptOwnerZipCode>07033</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
			<isDirector>1</isDirector>
			<isOfficer>0</isOfficer>
			<isTenPercentOwner>0</isTenPercentOwner>
			<isOther>0</isOther>
		</reportingOwnerRelationship>
	</reportingOwner>
	<derivativeTable>
		<derivativeTransaction>
			<securityTitle>
				<value>Stock Equivalent Units</value>
			</securityTitle>
			<conversionOrExercisePrice>
				<value>0.00</value>
				<footnoteId id="F1"/>
			</conversionOrExercisePrice>
			<transactionDate>
				<value>2004-01-01</value>
			</transactionDate>
			<deemedExecutionDate>
			</deemedExecutionDate>
			<transactionCoding>
				<transactionFormType>4</transactionFormType>
				<transactionCode>A</transactionCode>
				<equitySwapInvolved>0</equitySwapInvolved>
				<footnoteId id="F2"/>
			</transactionCoding>
			<transactionAmounts>
				<transactionShares>
					<value>1437.61</value>
				</transactionShares>
				<transactionPricePerShare>
					<value>17.39</value>
				</transactionPricePerShare>
				<transactionAcquiredDisposedCode>
					<value>A</value>
				</transactionAcquiredDisposedCode>
			</transactionAmounts>
			<exerciseDate>
				<footnoteId id="F3"/>
			</exerciseDate>
			<expirationDate>
				<footnoteId id="F4"/>
			</expirationDate>
			<underlyingSecurity>
				<underlyingSecurityTitle>
					<value>Common Shares</value>
				</underlyingSecurityTitle>
				<underlyingSecurityShares>
					<value>1437.61</value>
				</underlyingSecurityShares>
			</underlyingSecurity>
			<postTransactionAmounts>
				<sharesOwnedFollowingTransaction>
					<value>23950.42</value>
					<footnoteId id="F5"/>
				</sharesOwnedFollowingTransaction>
			</postTransactionAmounts>
			<ownershipNature>
				<directOrIndirectOwnership>
					<value>D</value>
				</directOrIndirectOwnership>
				<natureOfOwnership>
					<value/>
				</natureOfOwnership>
			</ownershipNature>
		</derivativeTransaction>
	</derivativeTable>
	<footnotes>
		<footnote id="F1">1 for 1</footnote>
		<footnote id="F2">The stock equivalent units were credited in a deferred account under the Directors Stock Equivalency Program.</footnote>
		<footnote id="F3">Not Applicable.</footnote>
		<footnote id="F4">The stock equivalent units are payable in cash following termination of the reporting person's service as a director of the Issuer.</footnote>
		<footnote id="F5">Includes 496.61 shares acquired pursuant to a dividend reinvestment feature of the Directors Deferred Compensation Plan and Directors Stock Equivalency Program, through November 26, 2003.</footnote>
	</footnotes>
	<remarks>
	</remarks>
	<ownerSignature>
		<signatureName>By: /s/Joseph J. LaRosa, attorney-in-fact for</signatureName>
		<signatureDate>2004-01-05</signatureDate>
	</ownerSignature>
</ownershipDocument>

