<DOCUMENT>
<TYPE>EX-99.77Q3
<SEQUENCE>6
<FILENAME>item-77q3_11730.txt
<DESCRIPTION>ITEM 77Q3 - OFFICER'S CERTIFICATIONS
<TEXT>
                       MASSMUTUAL PARTICIPATION INVESTORS
                       ITEM 77Q3 - OFFICERS' CERTIFICATION


The registrant's principal executive officer and principal financial officer
have concluded, based on their evaluation of the effectiveness of the design and
operation of the registrant's disclosure controls and procedures as of a date
within 90 days of the filing date of this report on Form N-SAR, that the design
and operation of such controls and procedures are effective to provide
reasonable assurance that information required to be disclosed by the registrant
in the reports that it files or submits under the Securities Exchange Act of
1934 is recorded, processed, summarized, and reported, within the time periods
specified in the Commission's rules and forms. There have been no significant
changes in the registrant's internal controls or in other factors that could
significantly affect these controls subsequent to the date of their evaluation.



<PAGE>

                                 CERTIFICATIONS

MassMutual Participation Investors
1500 Main Street, Suite 1100
Springfield, MA  01115

I, Robert E. Joyal, certify that:

1. I have reviewed this report on Form N-SAR of MassMutual Participation
Investors;

2. Based on my knowledge, this report does not contain any untrue statement of a
material fact or omit to state a material fact necessary to make the statements
made, in light of the circumstances under which such statements were made, not
misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial information included in this report, and
the financial statements on which the financial information is based, fairly
present in all material respects the financial condition, results of operations,
changes in net assets, and cash flows (if the financial statements are required
to include a statement of cash flows) of the registrant as of, and for, the
periods presented in this report;

4. The registrant's other certifying officers and I are responsible for
establishing and maintaining disclosure controls and procedures (as defined in
rule 30a-2(c) under the Investment Company Act) for the registrant and have:

      a) Designed such disclosure controls and procedures to ensure that
      material information relating to the registrant, including its
      consolidated subsidiaries, is made known to us by others within those
      entities, particularly during the period in which this report is being
      prepared;

      b) Evaluated the effectiveness of the registrant's disclosure controls and
      procedures as of a date within 90 days prior to the filing date of this
      report (the "Evaluation Date"); and

      c) Presented in this report our conclusions about the effectiveness of the
      disclosure controls and procedures based on our evaluation as of the
      Evaluation Date;

5. The registrant's other certifying officers and I have disclosed, based on our
most recent evaluation, to the registrant's auditors and the audit committee of
the registrant's board of directors (or persons performing the equivalent
functions):

      a) All significant deficiencies in the design or operation of internal
      controls which could adversely affect the registrant's ability to record,
      process, summarize, and report financial data and have identified for the
      registrant's auditors any material weaknesses in internal controls; and

      b) Any fraud, whether or not material, that involves management or other
      employees who have a significant role in the registrant's internal
      controls; and

6. The registrant's other certifying officers and I have indicated in this
report whether or not there were significant changes in internal controls or in
other factors that could significantly affect internal controls subsequent to
the date of our most recent evaluation, including any corrective actions with
regard to significant deficiencies and material weaknesses.

Date: February 26, 2003

/s/ Robert E. Joyal
----------------------------
Robert E. Joyal
President
MassMutual Participation Investors

<PAGE>

                                 CERTIFICATIONS

MassMutual Participation Investors
1500 Main Street, Suite 1100
Springfield, MA  01115


I, Charles C. McCobb, Jr., certify that:

1. I have reviewed this report on Form N-SAR of MassMutual Participation
Investors;

2. Based on my knowledge, this report does not contain any untrue statement of a
material fact or omit to state a material fact necessary to make the statements
made, in light of the circumstances under which such statements were made, not
misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial information included in this report, and
the financial statements on which the financial information is based, fairly
present in all material respects the financial condition, results of operations,
changes in net assets, and cash flows (if the financial statements are required
to include a statement of cash flows) of the registrant as of, and for, the
periods presented in this report;

4. The registrant's other certifying officers and I are responsible for
establishing and maintaining disclosure controls and procedures (as defined in
rule 30a-2(c) under the Investment Company Act) for the registrant and have:

      a) Designed such disclosure controls and procedures to ensure that
      material information relating to the registrant, including its
      consolidated subsidiaries, is made known to us by others within those
      entities, particularly during the period in which this report is being
      prepared;

      b) Evaluated the effectiveness of the registrant's disclosure controls and
      procedures as of a date within 90 days prior to the filing date of this
      report (the "Evaluation Date"); and

      c) Presented in this report our conclusions about the effectiveness of the
      disclosure controls and procedures based on our evaluation as of the
      Evaluation Date;

5. The registrant's other certifying officers and I have disclosed, based on our
most recent evaluation, to the registrant's auditors and the audit committee of
the registrant's board of directors (or persons performing the equivalent
functions):

      a) All significant deficiencies in the design or operation of internal
      controls which could adversely affect the registrant's ability to record,
      process, summarize, and report financial data and have identified for the
      registrant's auditors any material weaknesses in internal controls; and

      b) Any fraud, whether or not material, that involves management or other
      employees who have a significant role in the registrant's internal
      controls; and

6. The registrant's other certifying officers and I have indicated in this
report whether or not there were significant changes in internal controls or in
other factors that could significantly affect internal controls subsequent to
the date of our most recent evaluation, including any corrective actions with
regard to significant deficiencies and material weaknesses.

Date: February 26, 2003


/s/ Charles C. McCobb, Jr.
--------------------------
Charles C. McCobb, Jr.
Vice President and CFO
MassMutual Participation Investors

</TEXT>
</DOCUMENT>
