Abu Sadat Mohammad Sayem (29 March 1916 – 8 July 1997) was a Bangladeshi jurist and statesman. He was first Chief Justice of Bangladesh from 1972 to 1975. He became the President of Bangladesh in the aftermath of counter-coups in November 1975. He was made Chief Martial Law Administrator. Sayem presided over a cabinet headed by the three chiefs of the armed forces. The cabinet included civilian technocrats and politicians. Sayem resigned on grounds of ill health in April 1977, and was replaced by President Ziaur Rahman.