A treatment tool includes a first treatment portion having a first member having a first contact surface and a second member having a second contact surface, a first treatment portion having a first treatment portion having a first contact surface and a second contact surface, A moving mechanism for switching the first contact surface and the second contact surface to the open position, and a movable mechanism disposed on the distal side along the longitudinal axis with respect to the first treatment portion when the first contact surface and the second contact surface are located at the closed position, And a second treatment section for incising or separating the living tissue by adding the second treatment section.処置具は、第1接触面を有する第1部材と第2接触面を有する第2部材とを有する第1処置部と、第1接触面及び第2接触面が近接した閉位置と、離間した開位置とに切り替える移動機構と、第1接触面及び第2接触面が閉位置に位置しているときに第1処置部よりも長手軸に沿って先端側に配置可能で、生体組織にエネルギを付加することで生体組織を切開又は剥離させる第2処置部とを有する。
