Saiful Islam Khan (known as Hayat Saif; 16 December 1942 – 13 May 2019)[1] was a twentieth century modern Bengali poet and literary critic from Bangladesh.

A career bureaucrat, he retired in 2000 and since then was engaged in the corporate private sector and divided his time in World Scouting and literary and artistic pursuits.

He has been translated in English and Spanish and, in Bangladesh, is generally acclaimed as an intellectual interpreter of contemporary life and culture.

Saif was one of the major poets of Bangladesh belonging to the generation of 1960s who set a clear trend of modern poetry in Bangladesh along with such poets as Rafiq Azad, Asad Chowdhury, Mohammad Rafiq, Abdul Mannan Syed, Rabiul Hossain, Imrul Chowdhury and others.

One of these is Voice of Hayat Saif edited by Faizul Latif Chowdhury, published by Dibya Prakash in 1998.

The volume titled Hayat Saif: Selected Poems was published by Pathak Samabesh, Dhaka, in 2001.

Saif was working as the Managing Editor of a magazine titled Information Communication and Entertainment, ICE in short, since 2005.