Martín Alejandro Scelzo (born 5 February 1976 in Buenos Aires) is an Argentine rugby union footballer, currently playing for ASM Clermont Auvergne in the Top 14.

After playing in a number of Tests in 1998 he was included in Argentina's 1999 Rugby World Cup squad.

He next played for Argentina in June 2003, and was soon included in their 2003 Rugby World Cup squad.

He won the 1999-00 Heineken Cup while a player at the Northampton Saints, playing as a replacement in the final.

[1] After the elimination of Argentina by the All Blacks in the 2011 Rugby World Cup, Scelzo announced his retirement from Los Pumas on 10 October 2011.