The church of San Pietro alle Scale is an ancient church on via San Pietro in Siena, Italy. The building was originally a 12th-century structure, altered starting in the 17th century; the brick facade has a portal with a depiction of St Peter in Heaven with Angels.

Amid the interior’s Baroque stucco decoration, are the remains of a polyptich by Ambrogio Lorenzetti, depicting a Madonna with Child and Saints. The church also contains a Rest on the Flight to Egypt by Rutilio Manetti and an altarpiece depicting Madonna in Glory by Francesco Rustici also called il Rustichino. This is one of two churches in Siena dedicated to St Peter, the other is  the  church of San Pietro alla Magione.