Mario Vicini (21 February 1913 — 6 December 1995) was an Italian professional road bicycle racer. Vicini won the 1939 Italian road race championship, as well as the Giro del Lazio and the Giro di Toscana. He rode the Tour de France twice, finishing second (in 1937) and sixth (in 1938). In the Giro d'Italia, Vicini won three stages, and finished third in 1939. He later went on to build racing bicycles, simply named Vicini, using top-of-the-line components. His frame and fork sets are recognizable by the Vicini name stamped into the top end of the seat stay flutes and the V in the top of each side of the fork crown.