The Savoia-Marchetti SM.88, was an Italian twin-engined, three-seat, heavy fighter prototype of World War II, featuring a twin-boom structure, and powered by German Daimler-Benz DB 601 engines.
The SM.88, intended for export, was a land-based, multi-role heavy fighter regarded as an advanced combat aircraft at the time of its debut in 1939.
The retractable landing gear consisted of four wheels, two in the front fuselage and one on the tail-end of each boom.
With the advent of World War II, the Germans denied permission to export the DB 601 engine to Italy, effectively leaving the SM.88 without powerplants.
The Regia Aeronautica declined to order the aircraft due to the similar performance of the Messerschmitt Bf 110, which was already proven as reliable, in production and had better armament.