Isabelle Duthoit, born on December 6, 1970 in Montargis, France, is a French jazz and improvisational musician (clarinet and vocals) and composer. She studied classical music at the National Higher Conservatory of Music and Dance in Lyon under Jacques Di Donato, graduating in 1995. With Di Donato, she co-founded the Festival Fruits de Mhère for improvisational music in 1994. Duthoit's discography includes albums such as Lily (2017) and The Monophonic Havel (2018). She has collaborated with notable artists including Johannes Bauer, Michel Doneda, and Franz Hautzinger. Duthoit also studied Noh rituals in Japan during a residency at the Villa Kujoyama in 2008.