An endoscope comprises: an operation portion provided on a proximal end side of an insertion portion pulling members that extend from the bending pieces included in the bending portion a pulley rotated by a motor provided in the operation portion in a pulling direction in which any of the pulling members is pulled rotating bodies which are elastically deformable and arranged in a loose-fit state on the pulley and on which the respective pulling members are wound a manipulator that is provided so as to project from the operation portion and capable of being subjected to a tilting operation a suspension frame that is provided at the shaft portion of the manipulator and includes attachment portions to which the pulling members guided into the operation portion are fixed at positions facing each other across the manipulator and a force amount adjustment section that adjusts an amount of force of pulling a part of a pulling member on the insertion portion side relative to the pulley by changing a frictional resistance generated as a result of, upon an operation to tilt the manipulator being performed, the pulling member being pulled to reduce a diameter of the rotating body and an inner surface of the rotating body being thereby brought into contact with an outer circumferential face of the pulley.内視鏡は、挿入部の基端側に設けられた操作部と、湾曲部の湾曲駒から延出されて操作部内に導かれ相対的な移動により湾曲部を湾曲させる牽引部材と、操作部内に設けられたモーターによって牽引部材の牽引方向に回転されるプーリーと、弾性変形可能で外周面に牽引部材が巻回配置される、プーリーに遊嵌配置される回転体と、操作部から突設し、傾倒操作可能な操作子と、操作子の軸部に設けられ、操作部内に導かれた牽引部材が固設される取付部を、操作子を挟んで互いに対向する位置に有する吊り枠と、操作子を傾倒操作して牽引部材を牽引して、回転体を縮径させて内周面をプーリーの外周面に接触させて発生する摩擦抵抗を変化させてプーリーより挿入部側の牽引部材を牽引する力量を調整する力量調整部と、を具備する。
