Rubén Plaza Molina (born 29 February 1980) is a Spanish former professional road bicycle racer, who competed professionally between 2001 and 2019 for the Comunidad Valenciana–Kelme, S.L. Benfica, Liberty Seguros, Movistar Team (over three spells), Lampre–Merida, Orica–Scott and Israel Cycling Academy teams. During his career, he recorded a top 5 overall placing in the 2005 Vuelta a España, and won three Grand Tour stages.