Wrapping the wiring board 55 is electrically connected to the back side of the ultrasonic wave receiving unit 51 for transmitting and receiving ultrasonic waves, a rigid circuit board 56 which constitutes a rigid portion, which is extending from the rigid circuit board 56 (rigid portion) is configured to include a Hib 59, a plurality of drive wires 62 are electrically connected to the wiring board 55, is inserted into the wire insertion portion 72 of the housing 70 in a bundle wrapped by the envelope part 59.超音波を送受信する超音波送受信部51の背面側に電気的接続される配線基板55を、剛性部を構成するリジッド回路基板56と、このリジット回路基板56(剛性部)から延出された包被部59とを備えた構成とし、配線基板55に電気的に接続される複数の駆動配線62を、包被部59によって包み束ねた状態でハウジング70の配線挿通部72に挿入する。
