|24 Sep 23||Guillermo Brown ||-|| San Martin|
|07 Oct 23||San Martin ||-|| Defensores Unidos|
|11 Oct 23||San Lorenzo ||-|| San Martin|
|21 Oct 23||CSD Flandria ||-|| San Martin|
|20 Sep 23||Almagro|| ||0 - 3|| ||San Martin|
|16 Sep 23||San Martin|| ||1 - 1|| ||Agropecuario|
|03 Sep 23||San Martin|| ||1 - 2|| ||San Telmo|
|30 Aug 23||Argentinos Juniors|| ||0 - 1|| ||San Martin|
|25 Aug 23||Temperley|| ||0 - 1|| ||San Martin|
Club Atlético San Martín, mostly known as San Martín de San Juan, is an Argentine football club from the city of San Juan. The team currently plays in the Argentine Primera B Nacional, the second division of the Argentine football league system.
Before 2015, San Martín had only played four seasons in the Argentine top flight. Its first appearance was in the 1970 Nacional championship, finishing bottom of the group after winning only four of 20 games. It again played in the Argentine First Division in the 2007/8 season. The squad gained the promotion to the first division for the third time during the 2010–11 season, after beating Gimnasia y Esgrima (LP) 1–0 and later 1–1 on aggregate in the play-off for the second automatic promotion place. The team was relegated during the 2013 Torneo Final.
San Martín has played in the Argentine First Division since 2015, when the tournament was expanded to include 30 teams. It avoided relegation by placing 17th in the 2015 season, 13th in the 2016 season and 22nd in the 2016/17 season.
It currently plays most matches in the Hilario Sánchez stadium in Concepción, which has capacity for 19,000 spectators. It sometimes plays major games (notably against Boca Juniors and River Plate) in the Estadio San Juan del Bicentenario, which has capacity for 25,000 spectators.