Manuel Nicolás Carizza (born 23 August 1984 in Rosario) is an Argentine rugby union footballer who usually plays as a lock.

In 2014, he signed for South African Super Rugby side the Stormers and also played for their affiliated domestic provincial side Western Province, but returned to Racing Métro (since rebranded as Racing 92) for the 2015–16 season.

He made his international debut for Argentina in December 2004 in a match against South Africa, which the Springboks won by 39 points to 7.

He next played for the Pumas in April 2005, where he was called up to the starting line-up against Japan.

He was capped in June 2006 in one of the Tests against Wales during the hosting of a two match series, which Argentina eventually won.