Silvestre Siale Bileka (born 1939?) is an Equato-Guinean politician. Bileka served as Prime Minister from 4 March 1992 to 1 April 1996. He is a member of the Partido Democrático de Guinea Ecuatorial ( Democratic Party of Equatorial Guinea). Bileka also served as President of the Supreme Court, tendering his resignation to President Teodoro Obiang Nguema in January 2004. [1] The official reason for his resignation was "not being able to reach the desired result in terms of improvement of the operation of the judiciary". [2] He was the first senior state official to resign, as the President usually instead simply dismissed his colleagues. [1] He is a Bubi. [3]