The endoscope 1 includes a bending portion 7 that can be bent in all directions including four directions including an upward direction, a downward direction, a left direction, and a right direction, and a bending operation lever 45 that causes the bending portion 7 to bend when tilted. The bending operation lever 45 is integrally provided, and when the bending operation lever 45 is tilted to cause the bending portion 7 to bend, the bending portion 7 is moved in at least one of the four directions by a predetermined bending angle. A first tilt angle that tilts the bending operation lever 45 to bend, and a second tilt angle that tilts the bending operation lever 45 to bend the bending portion 7 in a direction different from at least one direction by a predetermined bending angle. A wire pulling mechanism 50 including a lever tilt angle adjusting mechanism in which the tilt angle is set to a different angle.内視鏡１は、上方向、下方向、左方向、および右方向の四方向を含む全方向に湾曲可能な湾曲部７と、傾倒されることによって湾曲部７を湾曲動作させる湾曲操作レバー４５と、湾曲操作レバー４５に一体に設けられており、湾曲操作レバー４５を傾倒して湾曲部７を湾曲動作させる際、湾曲部７を四方向のうちの少なくとも１つの方向に所定の湾曲角度だけ湾曲させるために湾曲操作レバー４５を傾倒させる第１の傾倒角度と、湾曲部７を少なくとも１つの方向とは異なる方向に所定の湾曲角度だけ湾曲させるために湾曲操作レバー４５を傾倒させる第２の傾倒角度と、を異なる角度に設定したレバー傾倒角度調整機構を含むワイヤ牽引機構５０と、を具備している。
