| Mio figlio professore | 1946 | Screenplay |
| Roma città libera | 1946 | Screenplay |
| Vivre en paix | 1947 | Screenplay |
| Le Crime de Giovanni Episcopo | 1947 | Screenplay |
| Le Voleur de bicyclette | 1948 | Screenplay |
| Proibito rubare | 1948 | Screenplay |
| Cielo sulla palude | 1949 | Screenplay |
| Au-delà des grilles | 1949 | Screenplay |
| Patto col diavolo | 1950 | Writer |
| È primavera... | 1950 | Writer |
| Pour l’amour du ciel | 1950 | Screenplay |
| Romanzo d'amore | 1950 | Writer |
| Bellissima | 1952 | Screenplay |
| Buongiorno, elefante! | 1952 | Screenplay |
| Camicie rosse | 1952 | Screenplay |
| Les Coupables | 1952 | Screenplay |
| Altri tempi - Zibaldone n. 1 | 1952 | Screenplay |
| La Dame sans camélia | 1953 | Screenplay |
| Il mondo le condanna | 1953 | Screenplay |
| La fièvre de vivre | 1953 | Screenplay |
| Les Vaincus | 1953 | Screenplay |
| Nous les femmes | 1953 | Screenplay |
| Notre temps | 1954 | Screenplay |
| Graziella | 1954 | Screenplay |
| Les Gaietés de l'escadron | 1954 | Screenplay |
| Dommage que tu sois une canaille | 1954 | Screenplay |
| Senso | 1954 | Screenplay |
| Du sang dans le soleil | 1955 | Screenplay |
| Femmes entre elles | 1955 | Screenplay |
| La Chance d'être femme | 1956 | Screenplay |
| Kean - Genio e sregolatezza | 1957 | Screenplay |
| Tu es mon fils | 1957 | Screenplay |
| Nuits blanches | 1957 | Screenplay |
| Maris en liberté | 1957 | Screenplay |
| Le Pigeon | 1958 | Screenplay |
| Le Défi | 1958 | Screenplay |
| L'Enfer dans la ville | 1959 | Screenplay |
| Profession Magliari | 1959 | Screenplay |
| C'est arrivé à Naples | 1960 | Screenplay |
| La contessa azzurra | 1960 | Screenplay |
| Rocco et ses frères | 1960 | Screenplay |
| Larmes de joie | 1960 | Screenplay |
| L'épave | 1961 | Writer |
| Le Meilleur Ennemi | 1961 | Screenplay |
| Boccace 70 | 1962 | Screenplay |
| Salvatore Giuliano | 1962 | Screenplay |
| Les Quatre Vérités | 1962 | Writer |
| Le Guépard | 1963 | Screenplay |
| Les Deux Rivales | 1964 | Screenplay |
| Casanova 70 | 1965 | Screenplay |
| Sandra | 1965 | Screenplay |
| Moi, moi, moi et les autres | 1966 | Screenplay |
| Les Ogresses | 1966 | Screenplay |
| Spara forte, più forte, non capisco | 1966 | Screenplay |
| La Mégère apprivoisée | 1967 | Screenplay |
| L'Étranger | 1967 | Screenplay |
| L'Homme, l'Orgueil et la Vengeance | 1967 | Writer |
| Casanova, un adolescent à Venise | 1969 | Screenplay |
| Sans rien savoir d'elle | 1969 | Screenplay |
| Metello | 1970 | Screenplay |
| Mortadella | 1971 | Screenplay |
| François et le chemin du soleil | 1972 | Screenplay |
| Il diavolo nel cervello | 1972 | Screenplay |
| I Figli Chiedono Perché | 1972 | Writer |
| Les aventures de Pinocchio | 1972 | Screenplay |
| Ludwig : Le Crépuscule des dieux | 1973 | Screenplay |
| Amore e ginnastica | 1973 | Writer |
| Amore amaro | 1974 | Writer |
| Violence et Passion | 1974 | Screenplay |
| Prete, fai un miracolo | 1975 | Screenplay |
| L'Innocent | 1976 | Screenplay |
| Caro Michele | 1976 | Screenplay |
| Uno scandalo perbene | 1984 | Writer |
| Bertoldo, Bertoldino e Cacasenno | 1984 | Screenplay |
| La Double Vie de Mathias Pascal | 1985 | Screenplay |
| I soliti ignoti vent'anni dopo | 1985 | Screenplay |
| La Storia | 1986 | Writer |
| Pourvu que ce soit une fille | 1986 | Screenplay |
| Les Yeux noirs | 1987 | Writer |
| Une catin pour deux larrons | 1987 | Screenplay |
| Ti presento un'amica | 1987 | Screenplay |
| Il male oscuro | 1990 | Screenplay |
| Rossini! Rossini! | 1991 | Screenplay |
| Une famille formidable | 1992 | Screenplay |
| La fine è nota | 1993 | Screenplay |
| Cari fottutissimi amici | 1994 | Screenplay |
| Facciamo paradiso | 1995 | Screenplay |
| Panni sporchi | 1999 | Screenplay |
| Il Cielo Cade | 2000 | Screenplay |
| Raul - Diritto di uccidere | 2005 | Screenplay |
