PROBLEM TO BE SOLVED: To provide an endoscope in which operability of a bending operation of a bending section is secured, and operability of a state changing operation for changing an operation state of a functional section provided on a distal end portion of an insertion tube is secured.SOLUTION: An endoscope includes a knob outer peripheral part which is formed in a projected and recessed shape along a direction around a turning axis, in a bending operation knob, and which has a peak position of projections and recesses, the peak position being positioned a first knob diameter direction dimension away from the turning axis for a turning diameter direction, wherein the knob outer peripheral part has a first axial-direction dimension of 19.2 mm or less for the turning axis direction parallel to the turning axis. The endoscope includes a lever outer end face which is provided in an operation lever while the lever outer end face is away from the turning axis by a lever diameter direction dimension smaller than the first knob diameter-direction dimension for the turning diameter direction, and which is positioned away from the knob outer peripheral part by a second axial direction dimension which is 14.2 mm or less for the turning axis direction and in which a sum with the first axial direction dimension becomes 16.6 mm or more.COPYRIGHT: (C)2014,JPO&INPIT【課題】湾曲部の湾曲操作の操作性が確保され、挿入部の先端部位に設けられる機能部の作動状態を変化させる状態変化操作の操作性が確保される内視鏡を提供すること。【解決手段】内視鏡は、湾曲操作ノブに回動軸回り方向に沿って凸凹状に形成され、回動径方向について回動軸から第1のノブ径方向寸法だけ離れて凸凹の頂上位置が位置するノブ外周部であって、前記回動軸に平行な回動軸方向について19.2mm以下の第1の軸方向寸法を有するノブ外周部を備える。前記内視鏡は、回動径方向について前記回動軸から前記第1のノブ径方向寸法より小さいレバー径方向寸法だけ離れる状態で前記操作レバーに設けられ、前記回動軸方向について14.2mm以下で、かつ、前記第1の軸方向寸法との和が16.6mm以上となる第2の軸方向寸法だけ前記ノブ外周部から離れて位置するレバー外端面を備える。【選択図】図5
