SAI Ambrosini was an Italian aircraft manufacturer.

The company was established in Passignano sul Trasimeno, Italy, in 1922 as the Società Aeronautica Italiana.

Prior to World War II, the firm built a number of light touring and racing aircraft, the most successful of which was the SAI.7.

[1] Ambrosini was reformed in 1946 and continued with the development and manufacture of the SAI.7 design, eventually producing jet fighter prototypes based on it, but these were not successful.

During the 1980s, the firm ventured into boatbuilding (including Azzurra, Italy's first America's Cup contender) and eventually into oil rigs before closing in 1992.