Nicolás "Nico" Martín Pareja (born 19 January 1984) is an Argentine professional footballer who plays as a central defender.
After starting out at Argentinos Juniors he went on to spend most of his career with Spartak Moscow and Sevilla, winning two Europa League trophies with the latter club.
He was hindered by several injuries.
Pareja won the 2008 Olympic tournament with Argentina.