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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 MDdyPYyb90T/NGJQZZRm8TWHRrYSc17j0IRmWe8oiuta7B0mEpKs1k1Qyin/cY7w
 icOtwVmCUo41b1cFx4kSJQ==

<SEC-DOCUMENT>0001127602-10-007040.txt : 20100303
<SEC-HEADER>0001127602-10-007040.hdr.sgml : 20100303
<ACCEPTANCE-DATETIME>20100303125349
ACCESSION NUMBER:		0001127602-10-007040
CONFORMED SUBMISSION TYPE:	4/A
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20060510
FILED AS OF DATE:		20100303
DATE AS OF CHANGE:		20100303

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			LINK RAYMOND A
		CENTRAL INDEX KEY:			0001221193

	FILING VALUES:
		FORM TYPE:		4/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-22780
		FILM NUMBER:		10652407

	MAIL ADDRESS:	
		STREET 1:		C/O FEI COMPANY
		STREET 2:		5350 NE DAWSON CREEK DRIVE
		CITY:			HILLSBORO
		STATE:			OR
		ZIP:			97124

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			FEI CO
		CENTRAL INDEX KEY:			0000914329
		STANDARD INDUSTRIAL CLASSIFICATION:	LABORATORY ANALYTICAL INSTRUMENTS [3826]
		IRS NUMBER:				930621989
		STATE OF INCORPORATION:			OR
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		5350 NE DAWSON CREEK DRIVE
		CITY:			HILLSBORO
		STATE:			OR
		ZIP:			97124
		BUSINESS PHONE:		503-726-7500

	MAIL ADDRESS:	
		STREET 1:		5350 NE DAWSON CREEK DRIVE
		CITY:			HILLSBORO
		STATE:			OR
		ZIP:			97124
</SEC-HEADER>
<DOCUMENT>
<TYPE>4/A
<SEQUENCE>1
<FILENAME>form4a.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4/A</documentType>

    <periodOfReport>2006-05-10</periodOfReport>

    <dateOfOriginalSubmission>2006-05-15</dateOfOriginalSubmission>

    <issuer>
        <issuerCik>0000914329</issuerCik>
        <issuerName>FEI CO</issuerName>
        <issuerTradingSymbol>FEIC</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001221193</rptOwnerCik>
            <rptOwnerName>LINK RAYMOND A</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>5350 NE DAWSON CREEK DRIVE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>HILLSBORO</rptOwnerCity>
            <rptOwnerState>OR</rptOwnerState>
            <rptOwnerZipCode>97124</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isOfficer>1</isOfficer>
            <officerTitle>Executive VP, CFO</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2006-05-10</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>3668</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>16924</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">This amendment is being filed to correct the number of shares the reporting person is expected to receive upon vesting of RSUs after an adjustment to the assumed tax rate.</footnote>
        <footnote id="F2">These grants were performance RSUs made in 2006 and the amount of the grant is based on the Company's performance against the Company's operating plan. Amount shown reflects the net amount of shares the reporting person is expected to receive after a portion of the granted shares are used to cover withholding taxes. The RSUs will vest in four equal annual installments beginning on February 6, 2007. The amount used to cover taxes is based on an assumed tax rate; if the assumed rate changes, and the amount of shares the reporting person acquires is different, an updated Form 4 will be filed.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Bradley J. Thies, Attorney in Fact</signatureName>
        <signatureDate>2010-03-03</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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