An elastic wave filter device includes a transmission filter chip, a reception filter chip, and a mounting terminal. The transmission filter chip includes a piezoelectric substrate and an IDT electrode provided on a principal surface of the piezoelectric substrate. The reception filter chip includes a piezoelectric substrate and an IDT electrode provided on a principal surface of the piezoelectric substrate. The transmission filter chip and the reception filter chip are laminated to provide sealed spaces above the IDT electrodes. The mounting terminal is disposed on a side of the reception filter chip opposite to the transmission filter chip side. The elastic wave filter device is mounted such that the reception filter chip faces a mounting surface.