A filter includes a multilayer body including a plurality of insulator layers stacked on top of one another. Outer electrodes are provided on surfaces of the multilayer body. A first resonator is connected to a first one of the outer electrodes and includes a first coil. A second resonator is connected to a second one of the outer electrodes and includes a second coil. A third resonator includes a third coil that is magnetically coupled with the first and second coils. The first and second coils are respectively defined by coil conductor layers provided on an insulator layer. The third coil is defined by via hole conductors that penetrate through the insulator layer in a z-axis direction.