MULTIPLEXER

A multiplexer includes a transmit filter including first acoustic wave resonators connected to a first path between a common terminal and a transmit terminal, one or some first acoustic wave resonators of the first acoustic wave resonators being provided on a first substrate, and a remaining first acoustic wave resonator being provided on a second substrate, and a receive filter including second acoustic wave resonators connected to a second path between the common terminal and a receive terminal, one or some second acoustic wave resonators of the second acoustic wave resonators being provided on the first substrate and a remaining second acoustic wave resonator being provided on the second substrate, and a resonator closest to the receive terminal in a plan view among the one or some first and second acoustic wave resonators being a second acoustic wave resonator of the one or some second acoustic wave resonators.