Andrés San Martín (born 12 April 1978 in Lomas de Zamora, Buenos Aires) is an Argentine retired footballer who played as a midfielder.

San Martín began his career in 1997 at second division club Club Atlético Banfield. Two years later, he moved to the top flight with Unión de Santa Fe. Meanwhile, his former team had won promotion to that level and, in 2002, the player rejoined Banfield.

In 2005, San Martín left Banfield for Club Atlético River Plate at the Estadio Monumental. After one season, he was loaned out to Spanish club CD Tenerife, in Segunda División, with the Canary Islands team having an option to buy at the season's closure. However, in December 2006, he was released, returning to his country, still on loan, with Arsenal de Sarandí.

At the end of the loan period, San Martín signed on a permanent basis, for the beginning of the Apertura 2008 tournament. In early 2009, he returned to River Plate for a second spell. After one season with the club, he was released and subsequently hired by third division's Sportivo Italiano.^[1]