The Autoridad Metropolitana de Autobuses (AMA, English: Puerto Rico Metropolitan Bus Authority) is a government-owned corporation and public transport bus service based in the San Juan metropolitan area.

AMA is one of three major public transportation systems serving the San Juan metropolitan area, along with Tren Urbano and the Cataño Ferry.

AMA provides bus transportation in the San Juan metropolitan area—which includes the municipalities of San Juan, Guaynabo, Bayamón, Trujillo Alto, Cataño, Toa Baja, Carolina, and Loíza—through a network of 32 fixed bus routes.

All buses require exact change in coins or the use of a magnetic fare card available at Tren Urbano stations.

In 2015, AMA introduced the first suburban bus fleet with 33 Ford Super Duty Glaval buses.