Plaza de Armas de Puente Alto, Central plaza in Puente Alto, Chile.

Plaza de Armas de Puente Alto is a rectangular public square at the southern end of Avenida Concha y Toro, in the Puente Alto district on the southeastern edge of Santiago. The square is lined with trees and benches, with walking paths that cross through planted areas, and it sits directly next to the Puente Alto metro station.

The square began as a transit point in the old village of Puente Alto, then called Pueblo de las Arañas, where muleteers and farmers set off toward the Cajón del Maipo or Argentina. Around it stood small shops, stables and houses among fields. In 2006 it was demolished and completely remodeled, coinciding with the opening of Metro Line 4's Plaza de Puente Alto station and the unveiling of the Manuel Rodríguez monument.

The square is where people from Puente Alto come to sit, walk, and meet friends as part of everyday life in the city. On weekends, small events and informal gatherings often take place there, making it a natural center for the neighborhood.

The square sits at the last stop of Metro Line 4 from Santiago, making it easy to reach without a car. Once there, the main avenue in front of it leads straight through the center of Puente Alto, which is a good starting point for exploring the area on foot.

The Manuel Rodríguez Erdoíza monument was unveiled in 2006 together with the remodeled square and the opening of the Metro Line 4 terminus. The statue faces the Andes, the route the guerrilla fighter and the muleteers of past centuries took toward the Cajón del Maipo and Argentina.