PROBLEM TO BE SOLVED: To provide an endoscope in which an insertion section is reduced in diameter and which is excellent in operability.SOLUTION: An endoscope 20 comprises: an insertion section 21 a bending tube 25p curvable in a predetermined direction with respect to the longitudinal axis of the insertion section 21 traction wires 37, 38 for bending the bending tube 25p in the predetermined direction fixing portions 42, 43 which are provided inside the bending tube 25p and within an angle less than 90 degrees clockwise about the longitudinal axis from a predetermined direction and within an angle of less than 90 degrees counterclockwise about the longitudinal axis, and to which the traction wires 37, 38 are fixed a treatment instrument channel tube 52 arranged between a first lower fixing portion 42 provided within an angle of less than 90 degrees clockwise from a predetermined direction and a second lower fixing portion 43 provided within an angle of less than 90 degrees counterclockwise from a predetermined direction and an upper- and lower-use rotating plate 28b provided proximal of the insertion section 21 and having a second wire fixing member 72 to which the opposite sides of the traction wires 37, 38 fixed respectively to the first lower fixing portion 42 and the second lower fixing portion 43 are coupled.SELECTED DRAWING: Figure 5BCOPYRIGHT: (C)2018,JPO&INPIT【課題】挿入部の細径化を実現し、操作性に優れた内視鏡を提供する。【解決手段】内視鏡20は、挿入部21と、挿入部21の長手軸に対して所定の方向に湾曲可能な湾曲管25pと、湾曲管25pを所定の方向に湾曲するための牽引ワイヤ37、38と、湾曲管25pの内部であって所定の方向から長手軸を中心に時計回りに90度未満の角度内及び反時計回りに90度未満の角度内に設けられ、牽引ワイヤ37、38が固定される固定部42、43と、所定の方向から時計回りに90度未満の角度内に設けられた第1の下固定部42と所定の方向から反時計回りに90度未満の角度内に設けられた第2の下固定部43との間に配置される処置具チャンネルチューブ52と、挿入部21より基端側に設けられ第1の下固定部42及び第2の下固定部43に固定された牽引ワイヤ37、38の反対側が連結される第2ワイヤ固定部材72を有する上下用回転板28bと、を具備している。【選択図】図5B
