A wiring board electrically connected to a back side of an ultrasound transmitting/receiving section that transmits/receives ultrasound includes a rigid circuit board included in a stiff portion, and a wrapping portion extending out from the rigid circuit board (stiff portion), and a plurality of drive wirings electrically connected to the wiring board are inserted into a wiring insertion portion of a housing with the plurality of drive wirings wrapped and bundled by the wrapping portion.