Francisco Mancebo Pérez (born 9 March 1976) is a Spanish professional cyclist, who currently rides for UCI Continental team Matrix Powertag. He initially rode for team Illes Balears–Banesto, but moved to AG2R Prévoyance in 2006.

Mancebo is a stage race specialist, with good climbing and individual time trial performances. He was the Spanish National Champion in 2004. He finished sixth in the 2004 Tour de France and fourth in the 2005 Tour de France. He also won a stage of the 2005 Vuelta a España and finished third in the general classification, making the podium for the second consecutive year.