An endoscope 1 includes: an operation portion 3 including a grasping portion 3A and a grasp-assistance face 35a on which a finger of an operator is to be disposed when the operator grasps the grasping portion 3A； an insertion portion 2 including on a distal end side thereof a bending portion 2b； at least one knob 5 that is provided on one side face of the operation portion 3 and that, by a rotational operation centering on a rotation axis 5a, causes the bending portion 2b to bend； at least two buttons including an air/water feeding button 6a and a suction button 6b that are disposed so as to protrude from a fluid control button arrangement portion 32 constituting an upper side of the operation portion 3, and that are arranged in parallel in a longitudinal axis direction of the operation portion 3, wherein switch root portions 6ar, 6br of the buttons 6a, 6b are disposed so as to be positioned between two intersection points P1, P2 at which an outermost diametrical path 5S of an up/down knob 5 that is projected onto a plane having a normal line along a rotation central axis and the fluid control button arrangement portion 32 intersect with each other.
