The endoscope treatment tool includes a sheath having a lumen formed therein, a treatment portion that is inserted into the lumen and can project and retract from a distal end of the sheath, and is connected to the proximal end side of the sheath. A main operation unit that causes the first operation and the second operation to be performed on the unit, and the first operation of the treatment unit that can be performed and the second operation cannot be performed by being spaced apart from the main operation unit. And an operation transmission member that is made of a flexible member, connects the auxiliary operation unit to the main operation unit, and transmits an operation input of the auxiliary operation unit to the main operation unit.本内視鏡用処置具は、ルーメンが形成されたシースと、前記ルーメン内に挿通され、前記シースの先端から突没可能な処置部と、前記シースの前記基端側に接続され、前記処置部に対して第一動作及び第二動作を実行させる主操作部と、前記主操作部と離間配置されて前記処置部の前記第一動作を実行可能且つ前記第二動作を実行不能に構成されている補助操作部と、軟性部材からなり、前記補助操作部を前記主操作部に接続し、前記補助操作部の前記主操作部に対する操作入力を伝達する操作伝達部材と、を備える。
