A multilayer bandpass filter that is capable of preventing variations in filter characteristics caused by variations in electrode formation, etc., is easily reduced in size, and performs predetermined impedance conversion between an input and an output, includes a first common electrode and a second common electrode disposed on a dielectric layer, and capacitor electrodes are disposed on a dielectric layer. An input/output terminal lead-out electrode is disposed on a dielectric layer, input/output terminal lead-out electrodes are disposed on a dielectric layer, and line electrodes are disposed on a dielectric layer. Via electrodes are formed to establish conduction in the layering direction between individual electrode patterns disposed on the plural dielectric layers. Three LC parallel resonators are constructed with such an arrangement, and respective line lengths of the line electrodes are gradually changed in order to convert the impedance between the input and the output.