PROBLEM TO BE SOLVED: To provide a sheath for a bending treatment instrument which is inserted into an endoscope channel, is capable of being used by intuitive operation and so as to be capable of bending operation, and is capable of withstanding a load caused by a grasp of the treatment instrument and excision motion and the bending treatment instrument using the sheath.SOLUTION: A sheath which has a treatment instrument at its tip and configures a bending treatment instrument capable of being bent freely comprises: inner sheaths composed of a device sheath through which a device wire connected with the treatment instrument to operate the treatment instrument is inserted and a plurality of bending sheaths through which a plurality of bending wires for performing bending operation on the bending treatment instrument are inserted respectively an outer sheath for accommodating the inner sheaths in a lump and a liner blade made to adhere to an outer surface of the outer sheath.COPYRIGHT: (C)2015,JPO&INPIT【課題】内視鏡チャンネルに挿入して直感的な操作で屈曲操作可能に使用できるとともに処置具の把持及び切除動作による荷重にも耐えることができる屈曲処置具のシース及びこのシースを用いた屈曲処置具を提供する。【解決手段】先端に処置具を備えると共に、自在に屈曲可能な屈曲処置具を構成するシースであって、前記処置具に接続されて該処置具を操作するデバイス用ワイヤが挿通するデバイス用シースと、前記屈曲処置具を屈曲操作せしめる複数の屈曲用ワイヤがそれぞれ挿通する複数の屈曲用シースとからなる内シースと、前記内シースをまとめて収納する外シースと、前記外シースの外表面に被着するライナーブレードと、を備える。【選択図】図13
