A substrate is formed with a plurality of spiral contactors on an upper surface serving as a first surface and a plurality of connecting terminals on a lower surface serving as a second surface. Since the spiral contactors are arranged in a matrix on the upper surface serving as the first surface, a lot of spiral contactors can be provided on the substrate of the present invention, and a mount area can be enlarged, and the size of the connector can be decreased. Also, the spiral contact terminal can improve a high-frequency characteristic.