ACOUSTIC WAVE FILTER DEVICE, COMPOSITE FILTER DEVICE, AND MULTIPLEXER

An acoustic wave filter device includes a longitudinally coupled resonator acoustic wave filter on a series arm that connects an input terminal and an output terminal, first and second parallel arm resonators on first and second parallel arms that connect the series arm and a ground potential, an input-side ground port of the longitudinally coupled resonator acoustic wave filter and a ground port of at least one of the first and second parallel arm resonators are connected in common, an output-side ground port of the longitudinally coupled resonator acoustic wave filter and a ground port of at least another of the first and second parallel arm resonators are connected in common, and an electrostatic capacitance of the first parallel arm resonator is different from an electrostatic capacitance of the second parallel arm resonator