Philippe Beaussant (born 6 May 1930) is a French musicologist and novelist, an expert on French baroque music, on which he has published widely. He is the founder of the Centre de Musique Baroque de Versailles, of which he was the artistic adviser of 1987 to 1996. He has also been a producer of musical programs for Radio France since 1974. His biography of Jean-Baptiste Lully, Lully ou le musicien du soleil (Éditions Gallimard, 1992), was the basis of the film Le Roi Danse (2000).
Beaussant won the 1993 Grand Prix du roman de l'Académie française for his novel Héloïse.