| Birth Date: | 25 February 1969 |
| Birth Place: | Lugo, Galicia, Spain |
| Weight: | 252lbs |
| Ru Position: | Prop |
| Clubs1: | Oviedo Rugby[1] |
| Repyears1: | 1998-1999 |
| Repcaps1: | 6 |
| Reppoints1: | 0 |
Luis Javier Martínez Villanueva (born Lugo, 12 July 1971) is a Spanish rugby union player. He plays as a prop.
His first international cap was during a match against Germany, at Heidelberg, on 26 April 1998.[2] He was part of the 1999 Rugby World Cup roster, where he played two matches. He was one of the Oviedo players who were in the roster, alongside Aitor Etxeberría, Sergio Souto and Carlos Souto.[3]