A ladder filter includes at least one series arm resonator connected in a path between first and second input/output terminals, at least two parallel arm resonators each connected between a connection node in the path and a ground, and an inductor connected in series to the at least one series arm resonator. The inductor is closer to the first input/output terminal than are the at least one series arm resonator and the at least two parallel arm resonators. Of the at least two parallel arm resonators, a first parallel arm resonator connected closest to the second input/output terminal has the highest anti-resonant frequency.