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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 U7sKktuZB358z6sZ+qaorZ9EmKMAI8W9sSk8Zx+NLas2WjIltSkiTmk/bw5MpPTk
 Q+fscwRE5zQ/AP3QRprMrw==

<SEC-DOCUMENT>0001140361-06-007186.txt : 20060511
<SEC-HEADER>0001140361-06-007186.hdr.sgml : 20060511
<ACCEPTANCE-DATETIME>20060511160852
ACCESSION NUMBER:		0001140361-06-007186
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20060502
FILED AS OF DATE:		20060511
DATE AS OF CHANGE:		20060511

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			LMI AEROSPACE INC
		CENTRAL INDEX KEY:			0001059562
		STANDARD INDUSTRIAL CLASSIFICATION:	AIRCRAFT PART & AUXILIARY EQUIPMENT, NEC [3728]
		IRS NUMBER:				431309065
		STATE OF INCORPORATION:			MO
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		3600 MUELLER RD
		CITY:			ST CHARLES
		STATE:			MO
		ZIP:			63302
		BUSINESS PHONE:		6369466525

	MAIL ADDRESS:	
		STREET 1:		P O BOX 900
		CITY:			ST CHARLES
		STATE:			MO
		ZIP:			63302

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			NORTHUP JUDITH W
		CENTRAL INDEX KEY:			0001362435

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-24293
		FILM NUMBER:		06830239

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		636-946-6525

	MAIL ADDRESS:	
		STREET 1:		3600 MUELLER ROAD
		CITY:			ST. CHARLES
		STATE:			MO
		ZIP:			63302-0900
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>doc1.xml
<DESCRIPTION>FORM 3
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2006-05-02</periodOfReport>

    <noSecuritiesOwned>1</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001059562</issuerCik>
        <issuerName>LMI AEROSPACE INC</issuerName>
        <issuerTradingSymbol>LMIA</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001362435</rptOwnerCik>
            <rptOwnerName>NORTHUP JUDITH W</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O LMI AEROSPACE, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>3600 MUELLER ROAD</rptOwnerStreet2>
            <rptOwnerCity>ST. CHARLES</rptOwnerCity>
            <rptOwnerState>MO</rptOwnerState>
            <rptOwnerZipCode>63301</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Judith W. Northup</signatureName>
        <signatureDate>2006-05-10</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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