The actuating member (5) is disposed on the proximal end side of the elongated member (10) and has a first moving part (31) and a second moving part (32) movable relative to each other in the axial direction of the elongated member (10) , A first extending portion (33) extended from the first moving portion (31) to the distal end side of the elongated member (10) and a second extending portion (33) extending from the second moving portion (32) toward the distal side of the elongated member (30) which is pushed and pulled in the axial direction of the elongated member (10) along with the movement of the respective moving parts (31, 32), and a second drawing part And an operation member (40) which is provided so as to be rotatable in a circumferential direction of the elongated member (10) and which manipulates the movement of the respective movement portions (31, 32), the operation member (40) A first guide portion inclined with respect to an orthogonal plane (CS) of an axial direction of the first moving portion and guiding the movement of the first moving portion, And a second guide part (42) for guiding the movement of the part (32).作動部材(5)は、長尺部材(10)の基端側に配置され、長尺部材(10)の軸方向に相対移動可能な第1移動部(31)および第2移動部(32)、第1移動部(31)から長尺部材(10)の先端側へ延伸された第1延伸部(33)、および第2移動部(32)から長尺部材(10)の先端側へ延伸された第2延伸部(34)、を備え、各移動部(31、32)の移動に伴い長尺部材(10)の軸方向に押し引きされる押し引き部材(30)と、長尺部材(10)の周方向に回転可能に設けられ、各移動部(31、32)の移動を操作する操作部材(40)と、を有し、操作部材(40)は、長尺部材(10)の軸方向の直交面(CS)に対して傾斜し、第1移動部(31)の移動を案内する第1案内部(41)と、直交面(CS)に対して傾斜し、第2移動部(32)の移動を案内する第2案内部(42)と、を備える。
