A frequency range and an attenuation amount of noise to be eliminated change depending upon to which one of two regions of side frames (34, 35) of a bottom (31) serving as a ground conductor surface first, second and third capacitors (21, 22, 23) are connected. Even if impedance of a ferrite core (12), the shape of a casing (11), capacitances of the capacitors (21, 22, 23), and the like are constant, a noise elimination characteristic changes by changing positions of the first to third capacitors (21, 22, 23). As a result, components including the ferrite core (12) are commonalized and the noise elimination characteristic is easily adjusted in spite of characteristics of electrical equipment.