The ultrasonic endoscope distal end portion (21) includes an ultrasonic transducer part (60), a wiring board (43) electrically connected to the ultrasonic transducer part (60), and a wiring board (43) A plurality of wirings (41a) connected to the wiring board (43), a plurality of wirings (41a) arranged in a position surrounded by the wiring board (43), the backing material (64) and the holding frame (43a to 43d) provided on the wiring board (43) a wiring board side fitting portion (43a to 43d) provided in the restricting portion (60) (60a) by fixing the regulating portion (60) to the backing material (64) or the holding frame (63) by fitting the first regulating portion side fitting portion (51a) to the ultrasonic transducer portion And a fixing portion (41 b) for maintaining connection between the wiring board (43) and the wiring board (43).超音波内視鏡先端部(21)は、超音波振動子部(60)と、超音波振動子部(60)に電気的に接続された配線基板(43)と、配線基板(43)を埋めているバッキング材(64)と、配線基板(43)に接続される複数の配線(41a)と、配線基板(43)、バッキング材(64)および保持枠(63)に囲まれた位置に配置された規制部(50)と、配線基板(43)に設けられた配線基板側嵌合部(43a~43d)と、規制部(60)に設けられ、配線基板側嵌合部(43a~43d)に嵌合する第1規制部側嵌合部(51a)と、規制部(60)をバッキング材(64)または保持枠(63)に固定することで、超音波振動子部(60)と配線基板(43)との接続を維持する固定部(41b)と、を含む。
