    <SEC-DOCUMENT>0001564590-21-018688-index.html : 20210413
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    <ACCEPTANCE-DATETIME>20210413160709
    ACCESSION NUMBER:		0001564590-21-018688
    CONFORMED SUBMISSION TYPE:	DEF 14A
    PUBLIC DOCUMENT COUNT:		6
    CONFORMED PERIOD OF REPORT:	20210526
    FILED AS OF DATE:		20210413
    DATE AS OF CHANGE:		20210413

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			FIBROGEN INC
    		CENTRAL INDEX KEY:			0000921299
    		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
    		IRS NUMBER:				000000000
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		DEF 14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-36740
    		FILM NUMBER:		21823160

    	BUSINESS ADDRESS:
    		STREET 1:		409 ILLINOIS STREET
    		CITY:			SAN FRANCISCO
    		STATE:			CA
    		ZIP:			94158
    		BUSINESS PHONE:		415-978-1200

    	MAIL ADDRESS:
    		STREET 1:		409 ILLINOIS STREET
    		CITY:			SAN FRANCISCO
    		STATE:			CA
    		ZIP:			94158
    </SEC-HEADER>
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    <TYPE>DEF 14A
    <SEQUENCE>1
    <FILENAME>fgen-def14a_20210526.htm
    <DESCRIPTION>DEF 14A
    <TEXT>
    Document 1 - file: fgen-def14a_20210526.htm

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    <TEXT>
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    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 3 - file: gxkxeifxlup1000001.jpg

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    <DOCUMENT>
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    <SEQUENCE>4
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    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 4 - file: gxkxeifxlup1000002.jpg

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    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 5 - file: gxkxeifxlup1000003.jpg

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    <TEXT>
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