2008-04-01 23:56:58 -

- Eaton Vance Senior Income Trust (NYSE: EVF), a closed-end management investment company, today declared its monthly distribution of $0.051 per share. The amount of monthly distributions may vary depending on a number of factors. As portfolio and market conditions change, the rate of distributions on common shares may change. The distribution will be paid on April 17, 2008, to

shareholders of record on April 10, 2008. The ex-date is April 8, 2008.

At this time the Fund believes that a portion of the distribution may be comprised of a return of capital. Further information will be available prior to the payment date at www.eatonvance.com/closed_end/tax_info.php . The final determination of tax characteristics of the Fund's distributions will occur after the end of the year, at which time it will be reported to the shareholders.

The Trust is managed by Eaton Vance Management, a subsidiary of Eaton Vance Corp., which is listed on the New York Stock Exchange under the symbol EV. Eaton Vance and its affiliates had $152.9 billion in assets under management as of January 31, 2008. Eaton Vance will make available periodic summary information regarding the Trust's portfolio investments. Those interested should call Eaton Vance Management at (800)-262-1122.

Eaton Vance
Investor Contact: 800-262-1122