A filter circuit includes: a filter element having a first terminal connected to an antenna, a second terminal connected to a receiving circuit, and a third terminal connected to a transmission circuit; a first inductor, a second inductor, and a third inductor connected in series between the first terminal and the third terminal of the filter element; a fourth inductor that has one end connected to a connecting node connecting the first inductor and the second inductor and that has the other end grounded; and a fifth inductor that has one end connected to a connecting node connecting the second inductor and the third inductor and that has the other end grounded.