Structure of non-reciprocal circuit element

A non-reciprocal circuit element according to the present invention comprises at least three center electrodes which are superposed and arranged so as to intersect with each other. A capacitor connected to one end of the center electrodes in parallel is provided. Earth electrodes connected to the other ends of the center electrodes and arranged between center electrodes at least one by one are provided. The electrical isolation layers arranged between the center electrodes and the earth electrodes, respectively are provided. A ferrite member arranged adjacent to the center electrodes is provided. A magnet for applying a direct current magnetic field to the ferrite member is provided. A yoke material combined with the ferrite member and the magnet to constitute a magnetic circuit is provided. According to the present invention, since the earth electrodes are provided between the center electrodes at least one by one and the electrical isolation layers are provided between the center electrodes and the earth electrodes, respectively, miniaturization and mass production can be implemented without deteriorating electric properties.