<SEC-DOCUMENT>0000863334-19-000003-index.html : 20190227
<SEC-HEADER>0000863334-19-000003.hdr.sgml : 20190227
<ACCEPTANCE-DATETIME>20190227105915
ACCESSION NUMBER:		0000863334-19-000003
CONFORMED SUBMISSION TYPE:	485BPOS
PUBLIC DOCUMENT COUNT:		4
FILED AS OF DATE:		20190227
DATE AS OF CHANGE:		20190227
EFFECTIVENESS DATE:		20190301

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			PIONEER MID CAP VALUE FUND
		CENTRAL INDEX KEY:			0000863334
		IRS NUMBER:				043091159
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1031

	FILING VALUES:
		FORM TYPE:		485BPOS
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	033-34801
		FILM NUMBER:		19636334

	BUSINESS ADDRESS:	
		STREET 1:		60 STATE ST - 13TH FL
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02109-1820
		BUSINESS PHONE:		6177427825

	MAIL ADDRESS:	
		STREET 1:		60 STATE ST
		STREET 2:		13TH FLOOR
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02109-1820

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	PIONEER CAPITAL GROWTH FUND /MA/
		DATE OF NAME CHANGE:	19980630

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	PIONEER GROWTH TRUST
		DATE OF NAME CHANGE:	19920703

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			PIONEER MID CAP VALUE FUND
		CENTRAL INDEX KEY:			0000863334
		IRS NUMBER:				043091159
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1031

	FILING VALUES:
		FORM TYPE:		485BPOS
		SEC ACT:		1940 Act
		SEC FILE NUMBER:	811-06106
		FILM NUMBER:		19636333

	BUSINESS ADDRESS:	
		STREET 1:		60 STATE ST - 13TH FL
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02109-1820
		BUSINESS PHONE:		6177427825

	MAIL ADDRESS:	
		STREET 1:		60 STATE ST
		STREET 2:		13TH FLOOR
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02109-1820

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	PIONEER CAPITAL GROWTH FUND /MA/
		DATE OF NAME CHANGE:	19980630

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	PIONEER GROWTH TRUST
		DATE OF NAME CHANGE:	19920703
<SERIES-AND-CLASSES-CONTRACTS-DATA>
<EXISTING-SERIES-AND-CLASSES-CONTRACTS>
<SERIES>
<OWNER-CIK>0000863334
<SERIES-ID>S000004143
<SERIES-NAME>Pioneer Mid Cap Value Fund
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000011629
<CLASS-CONTRACT-NAME>Pioneer Mid Cap Value Fund: Class A
<CLASS-CONTRACT-TICKER-SYMBOL>PCGRX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000011631
<CLASS-CONTRACT-NAME>Pioneer Mid Cap Value Fund: Class C
<CLASS-CONTRACT-TICKER-SYMBOL>PCCGX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000011632
<CLASS-CONTRACT-NAME>Pioneer Mid Cap Value Fund: Class Y
<CLASS-CONTRACT-TICKER-SYMBOL>PYCGX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000011633
<CLASS-CONTRACT-NAME>Pioneer Mid Cap Value Fund: Class R
<CLASS-CONTRACT-TICKER-SYMBOL>PCMRX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000156004
<CLASS-CONTRACT-NAME>Pioneer Mid Cap Value Fund: Class K
</CLASS-CONTRACT>
</SERIES>
</EXISTING-SERIES-AND-CLASSES-CONTRACTS>
</SERIES-AND-CLASSES-CONTRACTS-DATA>
</SEC-HEADER>
<DOCUMENT>
<TYPE>485BPOS
<SEQUENCE>1
<FILENAME>mcv022719485b.txt
<DESCRIPTION>POST-EFFECTIVE AMENDMENT NO. 51
<TEXT>
Document 1 - file: mcv022719485b.txt

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.G CUST AGREEMT
<SEQUENCE>2
<FILENAME>custodyappxa060118.txt
<DESCRIPTION>APPENDIX A TO CUSTODIAN AGREEMENT
<TEXT>
Document 2 - file: custodyappxa060118.txt

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.H OTH MAT CONT
<SEQUENCE>3
<FILENAME>appendixa060118admin.txt
<DESCRIPTION>APPENDIX A TO ADMINISTRATION AGREEMENT
<TEXT>
Document 3 - file: appendixa060118admin.txt

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.J OTHER OPININ
<SEQUENCE>4
<FILENAME>mcv022519consent.txt
<DESCRIPTION>CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
<TEXT>
Document 4 - file: mcv022519consent.txt

</DOCUMENT>
</SEC-DOCUMENT>