It comprises 36 legislators, 19 of whom are directly elected in single-member districts corresponding to the 19 departments of San Juan, and 17 of whom are elected in a single province-wide multi-member district through proportional representation.

Elections to the chamber take place every four years, when the entirety of its members are renewed.

[1] The Chamber convenes in the provincial capital, the City of San Juan.

[3] Since 2019, the president of the Chamber of Deputies has been Roberto Guillermo Gattoni, of the Justicialist Party.

[4] The Justicialist Party has a majority in the chamber since the 2019 elections, while the largest opposition bloc is Production and Labour.