The Savoia-Marchetti SM.84, not to be confused with the Savoia-Marchetti S.84 airliner prototype, was an Italian bomber aircraft of World War II. It was designed by Savoia-Marchetti as a replacement for its successful SM.79, and shared its three-engine layout. However, although it entered service with the Regia Aeronautica in 1941, it never replaced the SM.79, being retired from service before it.