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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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 l4bBZeKPpElLF8YHzpFgyA==

<SEC-DOCUMENT>0001457990-10-000002.txt : 20100108
<SEC-HEADER>0001457990-10-000002.hdr.sgml : 20100108
<ACCEPTANCE-DATETIME>20100108142910
ACCESSION NUMBER:		0001457990-10-000002
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20100107
FILED AS OF DATE:		20100108
DATE AS OF CHANGE:		20100108

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Fockler Jack E. Jr.
		CENTRAL INDEX KEY:			0001457990

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	811-08030
		FILM NUMBER:		10517175

	MAIL ADDRESS:	
		STREET 1:		C/O ROYCE & ASSOCIATES, LLC
		STREET 2:		745 FIFTH AVENUE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10151

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ROYCE MICRO-CAP TRUST, INC /MD/
		CENTRAL INDEX KEY:			0000912147
		IRS NUMBER:				133739778
		STATE OF INCORPORATION:			MD
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		ROYCE MICRO-CAP TRUST, INC.
		STREET 2:		745 FIFTH AVENUE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10151
		BUSINESS PHONE:		2124084587

	MAIL ADDRESS:	
		STREET 1:		ROYCE MICRO-CAP TRUST, INC.
		STREET 2:		745 FIFTH AVENUE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10151

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ROYCE MICRO CAP TRUST INC /MD/
		DATE OF NAME CHANGE:	20010430

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ROYCE OTC MICRO CAP FUND INC
		DATE OF NAME CHANGE:	19930917
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2010-01-07</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000912147</issuerCik>
        <issuerName>ROYCE MICRO-CAP TRUST, INC /MD/</issuerName>
        <issuerTradingSymbol>RMT</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001457990</rptOwnerCik>
            <rptOwnerName>Fockler Jack E. Jr.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O ROYCE &amp; ASSOCIATES, LLC</rptOwnerStreet1>
            <rptOwnerStreet2>745 FIFTH AVENUE</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10151</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Vice President</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2010-01-07</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>2140</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>7.45</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Held in trust</value>
                    <footnoteId id="F1"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2010-01-07</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>2140</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>7.45</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Held in wife's trust</value>
                    <footnoteId id="F2"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Shares held in the Jack E. Fockler, Jr. Revocable Trust u/a dated 5/10/2001.</footnote>
        <footnote id="F2">Shares held in the Cheryl L. Fockler Revocable Trust u/a dated 5/10/2001.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>Jack E. Fockler, Jr.</signatureName>
        <signatureDate>2010-01-08</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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