O.S.C.A. (Officine Specializzate Costruzione Automobili—Fratelli Maserati S.p.A.) was an Italian manufacturer of racing and sports cars established 1947 in San Lazzaro di Savena, Bologna, by the Maserati brothers, and closed down in 1967. The company name is usually written OSCA or Osca.

OSCA was founded in 1947 by Ernesto Maserati (engineering manager) and his two brothers Ettore, and Bindo (operations managers) who had all left Maserati after their ten-year contract with Adolfo Orsi terminated. Ten years earlier, in 1937, the remaining Maserati brothers had sold their shares in the Bologna-based company to the Orsi family, who relocated the company headquarters to their hometown of Modena in 1940. The Maserati company remains there to this day, but the Maserati brothers once again chose Bologna to be the home for their new company.

From 1951 to 1962, automobiles or engines made by OSCA also were entered in some Formula One and Formula Two events although they mainly built small sports cars of which some were designed by Pietro Frua. In the World Sportscar Championship OSCA ranked 10th (1953), 4th (1954), 6th (1957), 5th (1958) and 4th (1961).

Activity: 1950 - 1958
Grand Prix: 5
Best Result: 9th - F. Roll (Italy 1951)
Best Grid Position: 10th - E. Bayol (Italy 1952)
Fastest Laps: 0
Championship Points: 0