Writer
Troppo forte (1986) (writer, producer)
Once Upon a Time in America (1984) (writer, director)
Il mio nome è Nessuno (1973) (idea, director, producer)
Giù la testa (1971) (screenplay, director) (story) A Fistful of Dynamite (UK) (USA: alternative title)
C'era una volta il West (1968) (screenplay, director) (story) aka
Once Upon a Time in the West (International: English title) (UK) (USA)
Il buono, il brutto, il cattivo. (1966) (screenplay, director) (story) aka
The Good, the Bad and the Ugly (UK) (USA)
Per qualche dollaro in più (1965) (scenario) (screenplay, director, actor) aka For a Few Dollars More (UK) (USA)
Per un pugno di dollari (1964) (screenplay, director) (story) aka A Fistful of Dollars (UK) (USA)
Le verdi bandiere di Allah (1963) (writer)
Romolo e Remo (1961) (dialogue) (story) aka Duel of the Titans (USA)
Il colosso di Rodi (1961) (writer, director)
Le sette sfide (1961) (writer) aka The Seven Revenges (USA)
Gli ultimi giorni di Pompei (1959) (writer, director) aka The Last Days of Pompeii (USA)
Nel segno di Roma (1959) (writer) aka Sheba and the Gladiator (USA)
Afrodite, dea dell'amore (1958) (screenplay) aka Aphrodite, Goddess of Love (USA)
Director
Un genio, due compari, un pollo (1975) (uncredited) (producer)
Il cambio della guardia (1962) (uncredited) (some scenes)
Hanno rubato un tram (1954) (uncredited)
Producer
Bianco, rosso e Verdone (1981) (executive producer) (uncredited)
Un Sacco bello (1980) (producer)
Il giocattolo (1979) (executive producer) (uncredited)
Il gatto (1977) (producer)
Actor
Il folle di Marechiaro (1952)
Milano miliardaria (1951) (uncredited)
Ladri di biciclette (1948) (uncredited)
La bocca sulla strada (1941)
Appearances
Ennio Morricone (1995) (TV)
Bellissimo: Immagini del cinema italiano (1985)
An Almost Perfect Affair (1979) (uncredited)
Cineastas en México: Entrevista con Sergio Leone (1976)