The bending posture holding part 3 of the endoscope 1 is formed of a distal end side hard part 20 constituting the first end part 3a, a proximal end side hard part 30 constituting the second end part 3b, and a soft member. The outer tube 40 constituting the exterior and the outer tube 40 are disposed in the outer tube 40, and one of the fifth end portion 50a and the sixth end portion 50b is fixed in either the first hole 22h or the second hole 31h. The other end portion is slidably disposed in the first hole 22h or the second hole 31h, and can be bent with respect to the direction of the longitudinal axis and can maintain a bent shape. The holding tube 50 and a bent posture holding tube 50 which is disposed in the first hole 22h or the second hole 31h and is slidably disposed in the first hole 22h or the second hole 31h. And a pressing spring 60 that biases one end in the direction of the other end.内視鏡１の屈曲姿勢保持部３は、第１端部３ａを構成する先端側硬性部２０と、第２端部３ｂを構成する基端側硬性部３０と、軟性部材で形成されていて外装を構成する外皮チューブ４０と、外皮チューブ４０内に配置されて、第５端部５０ａまたは第６端部５０ｂの一方は第１の穴２２ｈ内または第２の穴３１ｈ内のいずれかに固定され、他方の端部は第１の穴２２ｈ内または第２の穴３１ｈ内に摺動自在に配置される、長手軸の方向に対して曲げることが可能で曲げた形状を維持可能な屈曲姿勢保持管５０と、第１の穴２２ｈ内または第２の穴３１ｈ内に配置され、第１の穴２２ｈ内または第２の穴３１ｈ内に摺動自在に配置されている屈曲姿勢保持管５０の一方の端部を他方の端部の方向に付勢する押しバネ６０と、を具備する。
