Rubén Peña Jiménez (born 18 July 1991) is a Spanish footballer who plays for SD Eibar as a right winger.
Born in Ávila, Castile and León, Peña made his senior debuts with local Real Ávila CF in Tercera División. In the summer of 2012 he signed for Real Valladolid, being initially assigned to the reserves in the same level.
Peña appeared in his first official game with the first team on 1 November 2012, playing the full 90 minutes in a 1–0 home win against Real Betis for the season's Copa del Rey (1–3 aggregate loss). Ten days later he made his La Liga debut, coming on as a late substitute in a 1–1 home draw to Valencia CF.
On 13 August 2013, Peña joined CD Guijuelo in Segunda División B. On 10 July of the following year he moved to CD Leganés, newly promoted to the second tier.
On 16 June 2016, after being an important figure in Lega's first-ever promotion to the top flight, Peña signed a three-year deal with fellow league club SD Eibar. He finished his first season with 28 appearances and one goal, helping to a tenth-place finish.