A sheath having flexibility, an operation wire is inserted so as to advance and retreat within the sheath, is provided out to the tip side of the sheath at least the endoscopic treatment tool, elastic single wire (4) and a connecting member for fixing respectively to each other and proximal end of the flexible wires and multiple treatment section consisting of a front end portion of the operation wire, and (5), the body portion of the tubular connecting member (12), a wall portion extending the axis of the body portion to (C1) direction from one end face of the body portion (12), and (13), the tip of the operating wire is fixed to the main body, ends of a plurality of flexible wires parts are fixed to the wall portion along the axial direction, when viewed in the axial direction from the wall side, one end is arranged at a position superimposed on the main body part at least of the elastic plurality of wires.この内視鏡用処置具は、可撓性を有するシースと、シース内に進退自在に挿通された操作ワイヤと、シースの先端側内部に出入り可能に設けられる少なくとも1本の弾性ワイヤ(4)からなる処置部と、操作ワイヤの先端部と複数の弾性ワイヤの基端部とを互いにそれぞれ固定する接続部材(5)と、を備え、接続部材は、筒状の本体部(12)と、本体部の一方の端面から本体部の軸線(C1)方向に延びる壁部(12)、(13)と、を有し、操作ワイヤの先端部は本体部に固定され、弾性ワイヤの複数の端部は軸線方向に沿うように壁部に固定され、壁部側から軸線方向に見た時に、複数の弾性ワイヤの少なくとも1つの端部は、本体部に重畳する位置に配置されている。
