The Tupolev Tu-125 was an unrealized project to develop a new long-range supersonic bomber for the Soviet Air Force. Development commenced in 1958 to replace the newest Tu-22. The "Tu-125" designation was an internal one used by the Tupolev design bureau. Since the aircraft was never built, it never received a military designation. In September 1962, the Soviet Air Force rejected the project and it was stopped. No aircraft were built.