Salomon Brothers Institutional Series Funds Inc.
125 Broad Street
New York, NY 10004

SUB-ITEM 77Q3

(a) (i)  Based upon their evaluation of the
 registrant's disclosure controls and procedures
 as conducted within 90 days of the filing date
 of this report, the registrant's chief executive
 officer and chief financial officer have
 concluded that those disclosure controls and
 procedures provide reasonable assurance that
 the material information required to be
 disclosed by the registrant in the reports
 it files or submits under the Securities
 Exchange Act of 1934, as amended (the 1934 Act),
 is recorded, processed, summarized and reported
 in substantial compliance with the 1934 Act and
 the Commission's rules and forms thereunder.

(ii) There were 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 last evaluation.

	(iii)	Certifications

	I, R. Jay Gerken, certify that:

1. I have reviewed this report on Form N-SAR
 of Salomon Brothers Institutional Series Funds Inc.

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.



	October 28, 2002


	/s/ R. JAY GERKEN

	Chief Executive Officer







Salomon Brothers Institutional Series Funds Inc
125 Broad Street
New York, NY 10004

SUB-ITEM 77Q3

I, Irving P. David, certify that:

1. I have reviewed this report on Form N-SAR of
 - Salomon Brothers Institutional Series Funds Inc.

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

b) 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.


 	October 28, 2002

	/s/ Irving P. David

	Chief Financial Officer