An endoscope includes: operation wires insertedly arranged inside an insertion portion and an operation portion, the operation wires causing a bending portion to bend by being pulled/slackened an operation member provided on the operation portion, the operation member performing a bending operation of the bending portion a rotation member provided in the operation portion, the rotation member pulling/slackening the operation wires by rotating in conjunction with an operation of the operation member and an amount-of-operation-force reducing portion giving rotation torque in a direction in which the rotation member inclines to reduce an amount of operation force of the operation member, in response to inclination of the operation member, wherein the rotation torque of the amount-of-operation-force reducing portion changes in conjunction with displacement of the operation member operated, and the amount-of-operation-force reducing portion offsets and reduces the amount of operation force required for the operation member.
