The endoscope 1 includes a bendable curved portion 2 b provided in the insertion portion 2, an operation portion 3 provided on a proximal end side of the insertion portion 2 and including a grip portion 5 that can be gripped by an operator, and an insertion portion 2 A shaft member 12 provided between the shaft member 12 and the grasping portion 5, a finger rest 20 provided at an end portion of the shaft member 12 and capable of arranging the thumb 51 in a state in which the operator grips the grasping portion 5, An arcuate insertion portion side finger rest surface 22 formed with a first radius 22 r centered on the first center point 25 and constituting the insertion portion side of the finger rest 20, and an arcuate insertion portion side finger rest surface 22 of the finger rest 20 An arcuate grip portion side finger rest surface 23 formed with a second radius 23 r having a second center point 26 positioned on the insertion portion side of the first center point 25 as the center,内視鏡1は、挿入部2に設けられ湾曲可能な湾曲部2bと、挿入部2の基端側に設けられ操作者が把持可能な把持部5を備える操作部3と、挿入部2と把持部5との間に設けられ傾倒可能な軸部材12と、軸部材12の端部に設けられ、操作者が把持部5を把持した状態で親指51を配置可能な指置き部20と、指置き部20の挿入部側を構成する、第1の中心点25を中心とする第1の半径22rで形成された弧状の挿入部側指置き面22と、指置き部20の把持部側を構成する、第1の中心点25よりも挿入部側に位置している第2の中心点26を中心とする第2の半径23rで形成された弧状の把持部側指置き面23と、を具備している。
