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. Though Savoia had already developed a similar twin-boom aircraft, (the S.55) the layout was regarded as a new concept for Italian aircraft industries.