The ultrasonic treatment instrument includes a vibration transmission member that integrally molds ultrasonic vibration transmitted to the first grip portion and integrally molded with the vibration transmission member, and a second grip portion that is separated from the first grip portion and separated from the first grip portion And a second grip portion that is movable between a proximal position adjacent to the first grip portion and the second grip portion. Wherein the ultrasonic treatment instrument operates the first gripping section in conjunction with the movement of the second gripping section to the separated position so that the ultrasonic treatment instrument is moved to the first gripping section in accordance with the movement of the first gripping section, And an interlocking operation unit that increases the separation distance between the grip portion of the first grip portion and the second grip portion.超音波処置具は、第1の把持部に向かって超音波振動を伝達し、一体成形される振動伝達部材と、前記第1の把持部に対して離間する離間位置と前記第1の把持部に対して近接する近接位置との間で移動可能な第2の把持部と、を備える。前記超音波処置具は、前記第2の把持部の前記離間位置への移動に連動させて前記第1の把持部を動作させることにより、前記第1の把持部の動作に対応させて前記第1の把持部と前記第2の把持部との間の離間距離を増加させる連動作動ユニットを備える。
