Ultrasound treatment apparatusExtending along the longitudinal axisThe vibration transmitting part which transmits ultrasonic vibration from the base end direction to the tip direction, andAn inner surface defining an internal space along said longitudinal axis within said vibration transmitting partA first tube extending along said longitudinal axis into said inner spaceProvided on the inner side of the first tube；A passage in which the sucking object passes toward the base end direction andIt is interposed between the inner surface and the first tube at the node position with the ultrasonic vibration about the longitudinal axis parallel to the longitudinal axisA first spacer that supports said first tube in a state where the outer peripheral surface of said first tube is not in contact with said inner surfaceIs provided.超音波処置装置は、長手軸に沿って延設され、基端方向から先端方向へ超音波振動を伝達する振動伝達部と、前記振動伝達部の内部に前記長手軸に沿って内部空間を規定する内面と、前記内部空間に前記長手軸に沿って延設される第１のチューブと、前記第１のチューブの内周側に設けられ、吸引される吸引対象が前記基端方向へ向かって通過する通路部と、前記長手軸に平行な長手軸方向について前記超音波振動のある節位置で前記内面と前記第１のチューブとの間に介在され、前記内面に前記第１のチューブの外周面が接触しない状態に前記第１のチューブを支持する第１のスペーサと、を具備する。
