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                                                                 Exhibit 99.Cert

                                  CERTIFICATION

I, James M. Hennessy, certify that:

1.      I have reviewed this report on Form N-CSR of ING SENIOR INCOME FUND;

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 statements, and other financial
information included in this report, 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 of 1940) 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.


/s/ James M. Hennessy                              Date: May 5, 2004
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James M. Hennessy
President and Chief Executive Officer

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                                  CERTIFICATION

I, Michael J. Roland, certify that:

1.      I have reviewed this report on Form N-CSR of ING SENIOR INCOME FUND;

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 statements, and other financial
information included in this report, 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 of 1940) 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.


/s/ Michael J. Roland                              Date: May 5, 2004
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Michael J. Roland
Executive Vice President and Chief Financial Officer