Aleksandr Fyodorovich Poleshchuk (Russian: Александр Фёдорович Полещук, born October 30, 1953) is a Russian cosmonaut.
In February 1989 he was selected as a test cosmonaut candidate (1989 Cosmonaut Candidates Class, Group 14, Civil Specialists). From September 1989 to January 1991 he underwent the complete course of general space training and was qualified as a test cosmonaut, and then till March 1992 he undertook advanced training for the Soyuz-TM transport vehicle and Mir station flight.
In 1992 he was selected as the backup flight engineer of the Soyuz TM-15 joint Russian-French mission, and consequently nominated as the flight engineer of the prime crew of Soyuz TM-16. In space from January 24 to July 22, 1993, he participated in a 179-day space flight with Gennady Manakov. During the flight he performed two EVAs totaling 9 hours and 58 minutes. Also testing of the androgynous peripheral docking subassembly of the Kristall module was performed.