Rubén Plaza Molina (born 29 February 1980) is a Spanish professional road bicycle racer who rides for UCI Professional Continental team Israel Cycling Academy.
He turned professional in 2001 with iBanesto.com, before moving to Comunidad Valenciana–Kelme.
Here he enjoyed his greatest success, with a stage win and a top 5 overall placing in the 2005 Vuelta a España.