Serge Fiori (born March 4, 1952) is a Canadian musician who was the lead vocalist and guitarist for Harmonium, a progressive rock band from Quebec.
When Harmonium disbanded in 1978, Fiori began collaborating with Richard Séguin to record Deux cents nuits à l'heure.
Most of the musicians from Harmonium appeared on the 1978 LP and again on Neil Chotem's Live au El Casino (1979) which included two new songs by Fiori.
He returned to the music business in 1983 as a songwriter for other artists, namely Diane Dufresne, Nanette Workman and stand-up comic Yvon Deschamps.
He spent the 1990s writing film scores (André Forcier's An Imaginary Tale (Une histoire inventée) in 1990, Roch Demers [fr]' Hathi in 2000, and Madame Brouette in 2002, with Mamadou Diabaté and Majoly) and TV music, making a short set of public appearances in 1995 to present Gayatri, Maha Mrityunjaya and Shiva, three CDs of new-age music.