UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM N-PX
                ANNUAL REPORT OF PROXY VOTING RECORD OF REGISTERED
                         MANAGEMENT INVESTMENT COMPANIES

                    Investment Company Act file number 811-09685
                                                           -----

Pioneer High Yield Fund
- ----------------------------------------------------
(Exact name of registrant as specified in charter)

60 State Street Boston, MA  02109
- ----------------------------------------------------
(Address of principal executive offices)

Dorothy Bourassa
60 State Street
Boston, MA  02109
- ----------------------------------------------------
(Name and address of agent for service)

Registrant's telephone number, including area code:  (617) 742-7825

Date of fiscal year end:  October 31

Date of reporting period:  July 1, 2005 to June 30, 2006

SIGNATURES

Pursuant to the requirements of the Investment Company Act of 1940, the
registrant has duly caused this report to be signed on its behalf by the
undersigned, thereunto duly authorized.

(Registrant)  Pioneer High Yield Fund

By (Signature and Title)  /s/ John F. Cogan, Jr.
                         -------------------------
                         John F. Cogan, Jr., Chairman and President

Date  August 17, 2006
      ----------------



=========================== PIONEER HIGH YIELD FUND ============================


ABITIBI CONSOLIDATED INC.

Ticker:       A.             Security ID:  003924107
Meeting Date: MAY 9, 2006    Meeting Type: Annual/Special
Record Date:  MAR 21, 2006

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1     Elect J. Anderson, H. Black, J. Bougie,   For       For        Management
      M. Davidge, W. Davis, R. Drouin, L.
      Lachapelle, G. Lukassen, J. Tory, J.
      Weaver as Directors
2     Ratify PricewaterhouseCoopers LLP as      For       For        Management
      Auditors
3     Establish Term Limits for Directors       Against   Against    Shareholder
4     Provide Shareholders With the Opportunity Against   For        Shareholder
      to Vote For or/Against Each Director
5     Convey to Senior Management that They Are Against   Against    Shareholder
      Accountable For Sustainable Profits or
      Will be Terminated Without Compensation
6     Cease Granting Management Bonuses and     Against   Against    Shareholder
      Options
7     Implement a Share Buyback Program         Against   Against    Shareholder


- --------------------------------------------------------------------------------

ALBERTO-CULVER CO.

Ticker:       ACV            Security ID:  013068101
Meeting Date: JAN 26, 2006   Meeting Type: Annual
Record Date:  DEC 1, 2005

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director Carol L. Bernick           For       For        Management
1.2   Elect Director Jim Edgar                  For       For        Management
1.3   Elect Director Leonard H. Lavin           For       For        Management
1.4   Elect Director Robert H. Rock             For       For        Management


- --------------------------------------------------------------------------------

ARCH CHEMICALS, INC.

Ticker:       ARJ            Security ID:  03937R102
Meeting Date: APR 27, 2006   Meeting Type: Annual
Record Date:  MAR 3, 2006

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director Daniel S. Sanders          For       For        Management
1.2   Elect Director Janice J. Teal             For       For        Management
2     Ratify Auditors                           For       For        Management


- --------------------------------------------------------------------------------

ATMOS ENERGY CORP.

Ticker:       ATO            Security ID:  049560105
Meeting Date: FEB 8, 2006    Meeting Type: Annual
Record Date:  DEC 15, 2005

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director Richard W. Cardin          For       For        Management
1.2   Elect Director Thomas C. Meredith         For       For        Management
1.3   Elect Director Nancy K. Quinn             For       For        Management
1.4   Elect Director Stephen R. Springer        For       For        Management
1.5   Elect Director Richard Ware, II           For       For        Management


- --------------------------------------------------------------------------------

BIO-RAD LABORATORIES, INC.

Ticker:       BIO            Security ID:  090572207
Meeting Date: APR 25, 2006   Meeting Type: Annual
Record Date:  FEB 27, 2006

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director Albert J. Hillman          For       For        Management
1.2   Elect Director Philip L. Padou            For       For        Management
2     Ratify Auditors                           For       For        Management


- --------------------------------------------------------------------------------

BRISTOL-MYERS SQUIBB CO.

Ticker:       BMY            Security ID:  110122108
Meeting Date: MAY 2, 2006    Meeting Type: Annual
Record Date:  MAR 6, 2006

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director Robert E. Allen            For       For        Management
1.2   Elect Director Lewis B. Campbell          For       For        Management
1.3   Elect Director Vance D. Coffman           For       For        Management
1.4   Elect Director James M. Cornelius         For       For        Management
1.5   Elect Director Peter R. Dolan             For       For        Management
1.6   Elect Director Louis J. Freeh             For       For        Management
1.7   Elect Director Laurie H. Glimcher, M.D.   For       For        Management
1.8   Elect Director Leif Johansson             For       For        Management
1.9   Elect Director James D. Robinson, III     For       For        Management
2     Ratify Auditor                            For       For        Management
3     Increase Disclosure of Executive          Against   Against    Shareholder
      Compensation
4     Provide for Cumulative Voting             Against   For        Shareholder
5     Claw-back of Payments under Restatements  Against   Against    Shareholder
6     Report on Animal Welfare                  Against   Abstain    Shareholder
7     Establish Term Limits for Directors       Against   Against    Shareholder


- --------------------------------------------------------------------------------

EQUITY OFFICE PROPERTIES TRUST

Ticker:       EOP            Security ID:  294741103
Meeting Date: MAY 24, 2006   Meeting Type: Annual
Record Date:  MAR 31, 2006

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director Marilyn Alexander          For       For        Management
1.2   Elect Director Thomas E. Dobrowski        For       For        Management
1.3   Elect Director William M. Goodyear        For       For        Management
1.4   Elect Director James D. Harper, Jr.       For       For        Management
1.5   Elect Director Richard D. Kincaid         For       For        Management
1.6   Elect Director Sheil Z. Rosenberg         For       For        Management
1.7   Elect Director Stephen I. Sadove          For       For        Management
1.8   Elect Director Sally Susman               For       For        Management
1.9   Elect Director Jan H.W.R. van der Vlist   For       For        Management
1.10  Elect Director Samuel Zell                For       For        Management
2     Ratify Auditors                           For       For        Management


- --------------------------------------------------------------------------------

FEI COMPANY

Ticker:       FEIC           Security ID:  30241L109
Meeting Date: MAY 11, 2006   Meeting Type: Annual
Record Date:  MAR 21, 2006

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director Michael J. Attardo         For       For        Management
1.2   Elect Director Thomas F. Kelly            For       For        Management
1.3   Elect Director Gerhard Parker             For       For        Management
1.4   Elect Director Lawrence A. Bock           For       For        Management
1.5   Elect Director William W. Lattin          For       For        Management
1.6   Elect Director James T. Richardson        For       For        Management
1.7   Elect Director Wilfred J. Corrigan        For       Withhold   Management
1.8   Elect Director Jan C. Lobbezoo            For       For        Management
1.9   Elect Director Donald R. Vanluvanee       For       Withhold   Management
2     Amend Omnibus Stock Plan                  For       Against    Management


- --------------------------------------------------------------------------------

FISHER SCIENTIFIC INTERNATIONAL INC.

Ticker:       FSH            Security ID:  338032204
Meeting Date: MAY 5, 2006    Meeting Type: Annual
Record Date:  MAR 17, 2006

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director Paul M. Montrone           For       For        Management
1.2   Elect Director Simon B. Rich              For       For        Management
1.3   Elect Director Scott M. Sterling          For       For        Management
2     Approve Qualified Employee Stock Purchase For       For        Management
      Plan
3     Ratify Auditors                           For       For        Management


- --------------------------------------------------------------------------------

GENERAL GROWTH PROPERTIES, INC.

Ticker:       GGP            Security ID:  370021107
Meeting Date: MAY 16, 2006   Meeting Type: Annual
Record Date:  APR 3, 2006

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director Adam Metz                  For       For        Management
1.2   Elect Director Robert Michaels            For       For        Management
1.3   Elect Director Thomas Nolan               For       For        Management
1.4   Elect Director John Riordan               For       For        Management
2     Amend Omnibus Stock Plan                  For       For        Management
3     Ratify Auditors                           For       For        Management


- --------------------------------------------------------------------------------

GEORGIA GULF CORP.

Ticker:       GGC            Security ID:  373200203
Meeting Date: MAY 16, 2006   Meeting Type: Annual
Record Date:  MAR 29, 2006

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director Dennis M. Chorba           For       For        Management
1.2   Elect Director Patrick J. Fleming         For       For        Management
2     Ratify Auditors                           For       For        Management


- --------------------------------------------------------------------------------

HARTFORD FINANCIAL SERVICES GROUP, INC., THE

Ticker:       HIG            Security ID:  416515104
Meeting Date: MAY 17, 2006   Meeting Type: Annual
Record Date:  MAR 20, 2006

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director Ramani Ayer                For       For        Management
1.2   Elect Director Ramon de Oliveira          For       For        Management
1.3   Elect Director Edward J. Kelly, III       For       For        Management
1.4   Elect Director Paul G. Kirk, Jr           For       For        Management
1.5   Elect Director Thomas M. Marra            For       For        Management
1.6   Elect Director Gail J. McGovern           For       For        Management
1.7   Elect Director Michael G. Morris          For       For        Management
1.8   Elect Director Robert W. Selander         For       For        Management
1.9   Elect Director Charles B. Strauss         For       For        Management
1.10  Elect Director H. Patrick Swygert         For       For        Management
1.11  Elect Director David K. Zwiener           For       For        Management
2     Ratify Auditors                           For       For        Management


- --------------------------------------------------------------------------------

LENNOX INTERNATIONAL, INC.

Ticker:       LII            Security ID:  526107107
Meeting Date: APR 20, 2006   Meeting Type: Annual
Record Date:  FEB 27, 2006

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director Linda G. Alvarado          For       For        Management
1.2   Elect Director Steven R. Booth            For       For        Management
1.3   Elect Director John E. Major              For       For        Management
1.4   Elect Director Jeffrey D. Storey          For       For        Management


- --------------------------------------------------------------------------------

LIBERTY PROPERTY TRUST

Ticker:       LRY            Security ID:  531172104
Meeting Date: MAY 18, 2006   Meeting Type: Annual
Record Date:  MAR 14, 2006

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director William P. Hankowsky       For       For        Management
1.2   Elect Director David L. Lingerfelt        For       For        Management
1.3   Elect Director Jose A. Mejia              For       For        Management
1.4   Elect Director John A . Miller            For       For        Management
2     Ratify Auditors                           For       For        Management
3     Amend Omnibus Stock Plan                  For       For        Management


- --------------------------------------------------------------------------------

MACK-CALI REALTY CORP.

Ticker:       CLI            Security ID:  554489104
Meeting Date: MAY 24, 2006   Meeting Type: Annual
Record Date:  APR 7, 2006

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director John R. Cali               For       For        Management
1.2   Elect Director Mitchell E. Hersh          For       For        Management
1.3   Elect Director Irvin D. Reid              For       For        Management
1.4   Elect Director Robert F. Weinberg         For       For        Management
2     Ratify Auditors                           For       For        Management
3     Require a Majority Vote for the Election  Against   Against    Shareholder
      of Directors


- --------------------------------------------------------------------------------

MERISTAR HOSPITALITY CORPORATION

Ticker:       MHX            Security ID:  58984Y103
Meeting Date: APR 27, 2006   Meeting Type: Special
Record Date:  MAR 17, 2006

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1     Approve Merger Agreement                  For       For        Management


- --------------------------------------------------------------------------------

NATIONAL FUEL GAS CO.

Ticker:       NFG            Security ID:  636180101
Meeting Date: FEB 16, 2006   Meeting Type: Annual
Record Date:  DEC 19, 2005

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect  Director R. Don Cash               For       For        Management
1.2   Elect  Director George L. Mazanec         For       For        Management
1.3   Elect  Director John F. Riordan           For       For        Management
2     Ratify Auditors                           For       For        Management
3     Amend Non-Employee Director Compensation  Against   Against    Shareholder


- --------------------------------------------------------------------------------

NRG ENERGY INC

Ticker:       NRG            Security ID:  629377508
Meeting Date: APR 28, 2006   Meeting Type: Annual
Record Date:  MAR 13, 2006

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director John F. Chlebowski         For       For        Management
1.2   Elect Director Howard E. Cosgrove         For       For        Management
1.3   Elect Director William E. Hantke          For       For        Management
1.4   Elect Director Anne C. Schaumburg         For       For        Management
2     Revise Board's Authority to Issue and     For       Against    Management
      Designate Preferred Stock
3     Amend Omnibus Stock Plan                  For       Against    Management
4     Ratify Auditors                           For       For        Management


- --------------------------------------------------------------------------------

OGE ENERGY CORP.

Ticker:       OGE            Security ID:  670837103
Meeting Date: MAY 18, 2006   Meeting Type: Annual
Record Date:  MAR 21, 2006

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director John D. Groendyke          For       For        Management
1.2   Elect Director Robert O. Lorenz           For       For        Management
1.3   Elect Director Steven E. Moore            For       For        Management
2     Ratify Auditors                           For       For        Management


- --------------------------------------------------------------------------------

PARKER-HANNIFIN CORP.

Ticker:       PH             Security ID:  701094104
Meeting Date: OCT 26, 2005   Meeting Type: Annual
Record Date:  AUG 31, 2005

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect  Director William E. Kassling       For       For        Management
1.2   Elect  Director Peter W. Likins           For       For        Management
1.3   Elect  Director Joseph M. Scaminace       For       For        Management
1.4   Elect  Director Wolfgang R. Schmitt       For       For        Management
2     Ratify Auditors                           For       For        Management
3     Approve Executive Incentive Bonus Plan    For       For        Management
4     Declassify the Board of Directors         Against   For        Shareholder


- --------------------------------------------------------------------------------

PDL BIOPHARMA INC

Ticker:       PDLI           Security ID:  69329Y104
Meeting Date: JUN 14, 2006   Meeting Type: Annual
Record Date:  APR 27, 2006

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director Karen A. Dawes             For       For        Management
1.2   Elect Director Bradford S. Goodwin        For       For        Management
1.3   Elect Director Mark Mcdade                For       For        Management
2     Ratify Auditors                           For       For        Management
3     Adjourn Meeting                           For       For        Management


- --------------------------------------------------------------------------------

RPM INTERNATIONAL INC.

Ticker:       RPM            Security ID:  749685103
Meeting Date: OCT 7, 2005    Meeting Type: Annual
Record Date:  AUG 12, 2005

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect  Director Dr. Max D. Amstutz        For       For        Management
1.2   Elect  Director Charles A. Ratner         For       For        Management
1.3   Elect  Director William B. Summers, Jr.   For       For        Management
1.4   Elect  Director Dr. Jerry Sue Thornton    For       For        Management


- --------------------------------------------------------------------------------

SAUL CENTERS, INC.

Ticker:       BFS            Security ID:  804395101
Meeting Date: APR 28, 2006   Meeting Type: Annual
Record Date:  MAR 9, 2006

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director Philip D. Caraci           For       For        Management
1.2   Elect Director Gilbert M. Grosvenor       For       For        Management
1.3   Elect Director Philip C. Jackson, Jr.     For       For        Management
1.4   Elect Director David B. Kay               For       For        Management
2     Amend Stock Ownership Limitations         For       Against    Management
3     Ratify Auditors                           For       For        Management
4     Other Business                            For       Against    Management


- --------------------------------------------------------------------------------

SEMCO ENERGY, INC.

Ticker:       SEN            Security ID:  78412D109
Meeting Date: MAY 22, 2006   Meeting Type: Annual
Record Date:  MAR 23, 2006

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director John T. Ferris             For       For        Management
1.2   Elect Director Paul F. Naughton           For       For        Management
1.3   Elect Director Edwina Rogers              For       For        Management


- --------------------------------------------------------------------------------

SOUTHERN UNION CO.

Ticker:       SUG            Security ID:  844030106
Meeting Date: MAY 2, 2006    Meeting Type: Annual
Record Date:  MAR 20, 2006

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director David L. Brodsky           For       For        Management
1.2   Elect Director Frank W. Denius            For       Withhold   Management
1.3   Elect Director Kurt A. Gitter, M.D.       For       For        Management
1.4   Elect Director Herbert H. Jacobi          For       For        Management
1.5   Elect Director Adam M. Lindemann          For       For        Management
1.6   Elect Director George L. Lindemann        For       For        Management
1.7   Elect Director Thomas N. McCarter, III    For       For        Management
1.8   Elect Director George Rountree, III       For       For        Management
1.9   Elect Director Alan D. Scherer            For       For        Management
2     Approve Sale of Company Assets            For       For        Management
3     Approve Restructuring Plan                For       For        Management
4     Amend Omnibus Stock Plan                  For       Against    Management
5     Amend Executive Incentive Bonus Plan      For       For        Management
6     Ratify Auditors                           For       For        Management


- --------------------------------------------------------------------------------

TESORO CORP.

Ticker:       TSO            Security ID:  881609101
Meeting Date: MAY 3, 2006    Meeting Type: Annual
Record Date:  MAR 14, 2006

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director Robert W. Goldman          For       For        Management
1.2   Elect Director Steven H. Grapstein        For       For        Management
1.3   Elect Director William J. Johnson         For       For        Management
1.4   Elect Director A. Maurice Myers           For       For        Management
1.5   Elect Director Donald H. Schmude          For       For        Management
1.6   Elect Director Bruce A. Smith             For       For        Management
1.7   Elect Director Patrick J. Ward            For       For        Management
1.8   Elect Director Michael E. Wiley           For       For        Management
2     Approve Omnibus Stock Plan                For       For        Management
3     Increase Authorized Common Stock          For       For        Management
4     Ratify Auditors                           For       For        Management


- --------------------------------------------------------------------------------

THERMO ELECTRON CORP.

Ticker:       TMO            Security ID:  883556102
Meeting Date: MAY 24, 2006   Meeting Type: Annual
Record Date:  MAR 29, 2006

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director Peter J. Manning           For       Withhold   Management
1.2   Elect Director Jim P. Manzi               For       Withhold   Management
1.3   Elect Director Elaine S. Ullian           For       Withhold   Management
2     Ratify Auditors                           For       For        Management
3     Require a Majority Vote for the Election  Against   For        Shareholder
      of Directors


- --------------------------------------------------------------------------------

WESCO INTERNATIONAL, INC.

Ticker:       WCC            Security ID:  95082P105
Meeting Date: MAY 17, 2006   Meeting Type: Annual
Record Date:  APR 3, 2006

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director Steven A. Raymund          For       For        Management
1.2   Elect Director Lynn M. Utter, Jr.         For       For        Management
1.3   Elect Director William J. Vareschi        For       For        Management
2     Ratify Auditors                           For       For        Management

========== END NPX REPORT