Jean Gruault (3 August 1924 – 9 June 2015) was a French screenwriter and actor. He wrote 25 films between 1960 and 1995. He was nominated for an Academy Award for Best Screenplay for the 1980 film Mon oncle d'Amérique. He was born in Fontenay-sous-Bois, Paris.

Selected filmography

• Paris Belongs to Us (1960)
• Vanina Vanini (1961)
• The Nun (1966)
• Two English Girls (1971)
• The Story of Adele H. (1975)
• Mon oncle d'Amérique (1980)
• Via degli specchi (1982)