PRINCIPAL INVESTORS FUND, INC.
                                DISTRIBUTION PLAN
                                  AND AGREEMENT
                                  SELECT CLASS


      DISTRIBUTION PLAN AND AGREEMENT made as of June 10, 2002, by and between
PRINCIPAL INVESTORS FUND, INC., a Maryland corporation (the "Fund"), and PRINCOR
FINANCIAL SERVICES CORPORATION, an Iowa corporation (the "Underwriter").

1.   This  Distribution  and  Service  Plan  (the  "Plan"),  when  effective  in
     accordance  with its  terms,  shall be the  written  plan  contemplated  by
     Securities and Exchange  Commission Rule 12b-1 under the Investment Company
     Act of 1940,  as amended  (the "Act") for the Select  Class  shares of each
     Series identified in Appendix A, attached hereto (the "Series"), a class of
     shares of Principal Investors Fund, Inc. (the "Fund").

2.   The Fund has entered  into a  Distribution  Agreement on behalf of the Fund
     with Princor  Financial  Services  Corporation (the  "Distributor"),  under
     which the  Distributor  uses all reasonable  efforts,  consistent  with its
     other business,  to secure  purchasers of shares of each Series of the Fund
     (the  "Shares").  Such  efforts may  include,  but neither are  required to
     include  nor  are  limited  to,  the   following:   (1)   formulation   and
     implementation  of  marketing  and  promotional  activities,  such  as mail
     promotions and television,  radio, newspaper, magazine and other mass media
     advertising; (2) preparation, printing and distribution of sales literature
     provided  to the Fund's  shareholders  and  prospective  shareholders;  (3)
     preparation,  printing and  distribution of prospectuses  and statements of
     additional  information  of the Fund and reports to  recipients  other than
     existing shareholders of the Fund; (4) obtaining such information, analyses
     and reports with respect to marketing  and  promotional  activities  as the
     Distributor  may, from time to time, deem advisable;  (5) making payment of
     sales  commission,  ongoing  commissions  and other  payments  to  brokers,
     dealers,  financial  institutions  or others who sell  Shares  pursuant  to
     Selling Agreements;  (6) paying compensation to registered  representatives
     or other employees of the Distributor who engage in or support distribution
     of the Fund's Shares; (7) paying  compensation to, and expenses  (including
     overhead  and  telephone  expenses)  of,  the  Distributor;  (8)  providing
     training,  marketing  and support to dealers and others with respect to the
     sale of Shares; (9) receiving and answering correspondence from prospective
     shareholders including distributing prospectuses,  statements of additional
     information,  and  shareholder  reports;  (10)  providing of  facilities to
     answer  questions from prospective  investors about Shares;  (11) complying
     with federal and state  securities  laws  pertaining to the sale of Shares;
     (12)  assisting  investors in  completing  application  forms and selecting
     dividend and other  account  options;  (13)  providing of other  reasonable
     assistance in connection with the  distribution of the Fund's shares;  (14)
     organizing and conducting of sales seminars and making payments in the form
     of  transactional  compensation  or promotional  incentives;  and (15) such
     other  distribution  and services  activities as the Fund determines may be
     paid for by the Fund  pursuant to the terms of this Plan and in  accordance
     with Rule 12b-1 of the Act.

3.   In consideration for the services provided and the expenses incurred by the
     Distributor pursuant to the Distribution  Agreement and Paragraph 2 hereof,
     all with  respect to Select  Class  shares of a Series of the Fund,  Select
     Class of each Series shall pay to the  Distributor a fee at the annual rate
     of 0.10% (or such lesser  amount as the Fund  Directors  may,  from time to
     time,  determine) of the average daily net assets of Select Class shares of
     such  Series.  This fee shall be accrued  daily and paid monthly or at such
     other intervals as the Fund Directors shall determine. The determination of
     daily net assets shall be made at the close of business each day throughout
     the month and  computed in the manner  specified in the Fund's then current
     Prospectus  for the  determination  of the net  asset  value of the  Fund's
     Select Class shares.  The Distributor may use all or any portion of the fee
     received  pursuant to this Plan to compensate  securities  dealers or other
     persons who have  engaged in the sale of Select  Class shares or to pay any
     of the expenses associated with other activities authorized under Paragraph
     2 hereof.

4.   The Fund  presently  pays,  and will  continue to pay, a management  fee to
     Principal  Management  Corporation (the "Manager") pursuant to a Management
     Agreement between the Fund and the Manager (the "Management Agreement"). It
     is recognized that the Manager may use its management fee revenue,  as well
     as its past profits or its resources from any other source, to make payment
     to the Distributor with respect to any expenses incurred in connection with
     the distribution of Select Class shares,  including the activities referred
     to in Paragraph 2 hereof. To the extent that the payment of management fees
     by the Fund to the Manager should be deemed to be indirect financing of any
     activity  primarily  intended to result in the sale of Select  Class shares
     within the meaning of Rule 12b-1,  then such payment  shall be deemed to be
     authorized by this Plan.

5.   This Plan shall not take effect until it has been approved (a) by a vote of
     at least a majority (as defined in the Act) of the outstanding Select Class
     shares of the Series of the Fund and (b) by votes of the  majority  of both
     (i) the Board of  Directors  of the Fund,  and (ii) those  Directors of the
     Fund who are not  "interested  persons" (as defined in the Act) of the Fund
     and who have no direct or indirect  financial  interest in the operation of
     this  Plan or any  agreements  related  to this  Plan  (the  "Disinterested
     Directors"),  cast in person at a meeting  called for the purpose of voting
     on this Plan or such agreements.

6.   Unless sooner terminated  pursuant to Paragraph 5, this Plan shall continue
     in effect for a period of twelve  months from the date it takes  effect and
     thereafter  shall  continue  in  effect  so  long as  such  continuance  is
     specifically approved at least annually in the manner provided for approval
     of this Plan in Paragraph 5(b).

7.   A  representative  of the  Underwriter  shall  provide to the Board and the
     Board shall  review at least  quarterly a written  report of the amounts so
     expended and the purposes for which such expenditures were made.

8.   This  Plan  may be  terminated  at any  time by vote of a  majority  of the
     Disinterested  Directors,  or by vote of a majority (as defined in the Act)
     of the outstanding Select Class shares of the Series of the Fund.

9.   Any  agreement  of the Fund  related to this Plan  shall be in writing  and
     shall provide:

     A.   That such agreement may be terminated at any time,  without payment of
          any penalty,  by vote of a majority of the Disinterested  Directors or
          by a vote of a majority  (as  defined  in the Act) of the  outstanding
          Select  Class  shares of the Series of the Fund on not more than sixty
          (60) days' written notice to any other party to the agreement); and

     B.   That such agreement shall terminate  automatically in the event of its
          assignment.

10.  While the Plan is in effect,  the selection and nomination of Directors who
     are not  "interested  persons" (as defined in the Act) of the Fund shall be
     committed  to the  discretion  of the  Directors  who  are  not  interested
     persons.

11.  This Plan does not  require  the  Manager or  Distributor  to  perform  any
     specific type or level of distribution  activities or to incur any specific
     level of expenses for activities  primarily  intended to result in the sale
     of Select Class shares.

12.  The Fund shall preserve copies of this Plan and any related  agreements and
     all reports made pursuant to Paragraph 7, for a period of not less than six
     years from the date of the Plan, or the  agreements or such report,  as the
     case may be, the first two years in an easily accessible place.

13.  This Plan may not be  amended  to  increase  materially  the amount of Fees
     provided for in Paragraph 3 hereof unless such amendment is approved in the
     manner  provided  for initial  approval in  Paragraph 5 hereof and no other
     material amendment to this Plan shall be made unless approved in the manner
     provided for initial approval in Paragraph 5(b) hereof.

      IN WITNESS WHEREOF, the parties hereto have executed and delivered this
Plan as of the first date written above.


                 PRINCIPAL INVESTORS FUND, INC.


                 BY:  /s/A. S. Filean
                      ----------------------------------------------------------
                      A. S. FILEAN, SENIOR VICE PRESIDENT AND SECRETARY


                 PRINCOR FINANCIAL SERVICES CORPORATION


                 BY:  /s/Ralph C. Eucher
                      ----------------------------------------------------------
                      RALPH C. EUCHER, PRESIDENT






                         PRINCIPAL INVESTORS FUND, INC.
                                   APPENDIX A

                                     Series
 Balanced Fund
 Bond and Mortgage Securities Fund
 Capital Preservation Fund
 European Fund
 Government Securities Fund
 High Quality Intermediate-Term Bond Fund
 High Quality Long-Term Bond Fund
 High Quality Short-Term Bond Fund
 International Emerging Markets Fund
 International Fund I
 International Fund II
 International SmallCap Fund
 LargeCap Blend Fund
 LargeCap Growth Fund
 LargeCap S&P 500 Index Fund
 LargeCap Value Fund
 LifeTime 2010 Fund
 LifeTime 2020 Fund
 LifeTime 2030 Fund
 LifeTime 2040 Fund
 LifeTime 2050 Fund
 LifeTime Strategic Income Fund
 MidCap Blend Fund
 MidCap Growth Fund
 MidCap S&P 400 Index Fund
 MidCap Value Fund
 Money Market Fund
 Pacific Basin Fund
 Partners LargeCap Blend Fund
 Partners LargeCap Growth Fund I
 Partners LargeCap Growth Fund II
 Partners LargeCap Value Fund
 Partners MidCap Blend Fund
 Partners MidCap Growth Fund
 Partners MidCap Value Fund
 Partners SmallCap Growth Fund I
 Partners SmallCap Growth Fund II
 Partners SmallCap Value Fund
 Real Estate Fund
 SmallCap Blend Fund
 SmallCap Growth Fund
 SmallCap S&P 600 Index Fund
 SmallCap Value Fund
 Technology Fund