The Ambrosini SAI.2S was a four-seat light aircraft produced in Italy shortly before World War II.

It was a low-wing, cantilever cabin monoplane of conventional configuration with fixed, tailwheel undercarriage.

At least one example was converted postwar with the de Havilland Gipsy Six Series II of 205 horsepower (153 kW).

The wing carried Handley Page slots and split flaps, and dual controls were fitted.

One aircraft was still extant as of 2006[update], and is preserved at the Gianni Caproni Museum of Aeronautics at Trento Airport.