<SEC-DOCUMENT>0000863334-17-000002-index.html : 20170228
<SEC-HEADER>0000863334-17-000002.hdr.sgml : 20170228
<ACCEPTANCE-DATETIME>20170228113555
ACCESSION NUMBER:		0000863334-17-000002
CONFORMED SUBMISSION TYPE:	485BPOS
PUBLIC DOCUMENT COUNT:		7
FILED AS OF DATE:		20170228
DATE AS OF CHANGE:		20170228
EFFECTIVENESS DATE:		20170301

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:		17645486

	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:		17645487

	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>
<NEW-SERIES-AND-CLASSES-CONTRACTS>
<OWNER-CIK>0000863334
<NEW-CLASSES-CONTRACTS>
<SERIES-ID>S000004143
<SERIES-NAME>Pioneer Mid Cap Value Fund
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000185373
<CLASS-CONTRACT-NAME>Pioneer Mid Cap Value Fund: Class T
</CLASS-CONTRACT>
</NEW-CLASSES-CONTRACTS>
</NEW-SERIES-AND-CLASSES-CONTRACTS>
<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>mcv022817485b.txt
<DESCRIPTION>POST-EFFECTIVE AMENDMENT NO. 47
<TEXT>
Document 1 - file: mcv022817485b.txt

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.G CUST AGREEMT
<SEQUENCE>2
<FILENAME>amendmentcustody053116.txt
<DESCRIPTION>AMENDMENT TO CUSTODIAN AGREEMENT
<TEXT>
Document 2 - file: amendmentcustody053116.txt

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.H OTH MAT CONT
<SEQUENCE>3
<FILENAME>taagreement110215.txt
<DESCRIPTION>TRANSFER AGENCY AGREEMENT
<TEXT>
Document 3 - file: taagreement110215.txt

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.H OTH MAT CONT
<SEQUENCE>4
<FILENAME>appendixa122716adminagency.txt
<DESCRIPTION>APPENDIX A TO ADMINISTRATIVE AGENCY AGREEMENT
<TEXT>
Document 4 - file: appendixa122716adminagency.txt

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.J OTHER OPININ
<SEQUENCE>5
<FILENAME>mcv022717consent.txt
<DESCRIPTION>CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
<TEXT>
Document 5 - file: mcv022717consent.txt

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.M 12B-1 PLAN
<SEQUENCE>6
<FILENAME>distplan011017.txt
<DESCRIPTION>DISTRIBUTION PLAN
<TEXT>
Document 6 - file: distplan011017.txt

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.N 18F-3 PLAN
<SEQUENCE>7
<FILENAME>mcv18f3plan-tshs.txt
<DESCRIPTION>MULTIPLE CLASS PLAN PURSUANT TO RULE 18F-3
<TEXT>
Document 7 - file: mcv18f3plan-tshs.txt

</DOCUMENT>
</SEC-DOCUMENT>