The introduction device is provided along a longitudinal axis 25 of the grip portion, the grip portion having a first wall portion 41A and a second wall portion 41B extending in a direction intersecting the first wall portion 41A, A curved portion 27 that can be curved in a plane and in a second surface that intersects the first surface, and the first wall portion 41A is rotatably provided. The curved portion 27 is disposed in the first surface according to the amount of rotation. The first dial portion 54 to be bent, the shaft portion rotatably provided on the second wall portion 41B, and the bending portion 27 is bent in the second surface according to the rotation amount while being fixed to the shaft portion. And a dial unit that is inclined with respect to the longitudinal axis when viewed from the second wall portion side.導入装置は、第１壁部４１Ａと、第１壁部４１Ａと交差する方向に延びる第２壁部４１Ｂと、を有するグリップ部と、前記グリップ部の長手軸２５に沿って設けられ、第１面内および前記第１面と交差する第２面内で湾曲可能な湾曲部２７と、第１壁部４１Ａに回転可能に設けられ、回転量に応じて湾曲部２７を前記第１面内で湾曲させる第１ダイヤル部５４と、第２壁部４１Ｂに回転可能に設けられた軸部と、前記軸部に固定されるとともに回転量に応じて湾曲部２７を前記第２面内で湾曲させる第２ダイヤル部５６と、を有し、前記第２壁部側から見たときに、前記軸部は前記長手軸に対して斜めであるダイヤルユニットと、を備えている。
