<SEC-DOCUMENT>0000819940-16-000138-index.html : 20160226
<SEC-HEADER>0000819940-16-000138.hdr.sgml : 20160226
<ACCEPTANCE-DATETIME>20160226154537
ACCESSION NUMBER:		0000819940-16-000138
CONFORMED SUBMISSION TYPE:	POS EX
PUBLIC DOCUMENT COUNT:		2
FILED AS OF DATE:		20160226
DATE AS OF CHANGE:		20160226
EFFECTIVENESS DATE:		20160226

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			DREYFUS INVESTMENT FUNDS
		CENTRAL INDEX KEY:			0000799295
		IRS NUMBER:				043106135
		STATE OF INCORPORATION:			MA
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		POS EX
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	033-08214
		FILM NUMBER:		161461338

	BUSINESS ADDRESS:	
		STREET 1:		200 PARK AVENUE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10166
		BUSINESS PHONE:		212-922-6000

	MAIL ADDRESS:	
		STREET 1:		200 PARK AVENUE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10166

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	MELLON INSTITUTIONAL FUNDS INVESTMENT TRUST
		DATE OF NAME CHANGE:	20030707

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	STANDISH AYER & WOOD INVESTMENT TRUST
		DATE OF NAME CHANGE:	19920703
</SEC-HEADER>
<DOCUMENT>
<TYPE>POS EX
<SEQUENCE>1
<FILENAME>lp1dif.htm
<DESCRIPTION>POST-EFFECTIVE AMENDMENT NO. 181
<TEXT>
Document 1 - file: lp1dif.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.N 18F-3 PLAN
<SEQUENCE>2
<FILENAME>rule18f3.htm
<DESCRIPTION>RULE 18F-3 PLAN
<TEXT>
Document 2 - file: rule18f3.htm

</DOCUMENT>
</SEC-DOCUMENT>