Mariano Martínez is a Spanish-French former professional road racing cyclist. He won the King of the Mountains competition in 1978 Tour de France. Born in Spain, Martínez became a naturalized French citizen in 1963. He is the father of former racing cyclists Miguel and Yannick Martinez and the grandfather of racing cyclist Lenny Martinez.

The 1978 Tour de France was the 65th edition of the Tour de France, one of cycling's Grand Tours. It took place between 29 June and 23 July, with 22 stages covering a distance of 3,908 km (2,428 mi).