Abstract: Using a conventional surface mount filter, it is difficult to miniaturize as the filter characteristics, especially a harmonic rejection characteristic at a fundamental frequency is made favorable, and it is also difficult to regulate the filter characteristics after mounting. In the present invention, plural through holes coated with conductive films are formed on a dielectric block having a high dielectric constant and external electrodes are formed over almost all of the outer surfaces of the dielectric block, except one side surface thereof, while a conductive film is formed on almost all of one main surface of a low dielectric constant substrate, and plural striplines are formed on the other main surface thereof. The rear portions of the striplines and the conductive films in the through holes are electrically connected, while the front portions of the striplines are grounded through chip capacitors.