The Alfa Romeo Spider is a two-seater, front-engined, rear-drive roadster manufactured and marketed by Alfa Romeo from 1966 to 1994 in four distinct generations, or "series", each with modifications ranging from modest to extensive.

A roadster is an open two-seat car with emphasis on sporting appearance or character. Initially an American term for a two-seat car with no weather protection, its usage has spread internationally and has evolved to include two-seat convertibles.