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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 JvqBQd03wkYyT5K/dMGfs+QEXI+45+XkcxWUZLJbaPoaLXKOA5qQKwwK395AeFFK
 3i8/bw4ZHzEvYc/PCmYyEQ==

<SEC-DOCUMENT>0000914475-05-000050.txt : 20050622
<SEC-HEADER>0000914475-05-000050.hdr.sgml : 20050622
<ACCEPTANCE-DATETIME>20050622195731
ACCESSION NUMBER:		0000914475-05-000050
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20050620
FILED AS OF DATE:		20050622
DATE AS OF CHANGE:		20050622

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			RANIERI RICHARD J
		CENTRAL INDEX KEY:			0001225617

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-22705
		FILM NUMBER:		05911237

	BUSINESS ADDRESS:	
		STREET 1:		925 PAGE MILL ROAD
		CITY:			PALO ALTO
		STATE:			CA
		ZIP:			94304
		BUSINESS PHONE:		6508467665

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			NEUROCRINE BIOSCIENCES INC
		CENTRAL INDEX KEY:			0000914475
		STANDARD INDUSTRIAL CLASSIFICATION:	BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836]
		IRS NUMBER:				330525145
		STATE OF INCORPORATION:			CA
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		12790 EL CAMINO REAL
		CITY:			SAN DIEGO
		STATE:			CA
		ZIP:			92130
		BUSINESS PHONE:		(858) 617-7600

	MAIL ADDRESS:	
		STREET 1:		12790 EL CAMINO REAL
		CITY:			SAN DIEGO
		STATE:			CA
		ZIP:			92130
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2005-06-20</periodOfReport>

    <noSecuritiesOwned>1</noSecuritiesOwned>

    <issuer>
        <issuerCik>0000914475</issuerCik>
        <issuerName>NEUROCRINE BIOSCIENCES INC</issuerName>
        <issuerTradingSymbol>NBIX</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001225617</rptOwnerCik>
            <rptOwnerName>RANIERI RICHARD J</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>12790 EL CAMINO REAL</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>SAN DIEGO</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>92130</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Sr. VP, Human Resources</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <footnotes></footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Paul W. Hawran, By Power of Attorney</signatureName>
        <signatureDate>2005-06-21</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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