Mario Fioretti (born 11 September 1973 ) is an Italian professional basketball coach, who is currently the head coach of Derthona Tortona, he was assistant coach for 22 years for Olimpia Milano of the LBA and the EuroLeague.
After graduating, he traveled to America wherein he became an assistant coach to Bobby Knight, the head coach of the Indiana Hoosiers. He stayed there for a year. After that, he went back to Italy and became an assistant coach for the Olimpia Milano in 2004 under head coach Attilio Caja. Since then, he has become a vital part of the team's coaching staff.
On June 16, 2025, he signed with Derthona of the Italian Lega Basket Serie A (LBA).
Fioretti is also an assistant coach for several youth teams in Bergamo since 2003.
Mario Fioretti was born in Bergamo, in the Lombardy Region of Northern Italy. He graduated with a degree in Economics at University of Bergamo in 1999.