The medical device with a bending portion is provided with an insertion portion provided with a bending portion on a distal end side, an operation portion provided at a proximal end of the insertion portion, and an operation portion, and the tilt direction and the tilt angle can be changed. And a finger rest provided at one end of the shaft, and an operator for performing an operation of bending the bending portion, and the finger rest includes an attachment portion for attaching to one end of the shaft. A substantially rectangular mounting surface composed of four sides set to a predetermined length, a first operation surface that is a substantially triangular inclined surface with the first side of the mounting surface as the bottom, and a first side A second operation surface that is a substantially triangular inclined surface with the second side facing the bottom as a base, and a third operation that is a substantially rectangular inclined surface with the third side that intersects the first side of the mounting surface as one side. And a fourth operation surface that is a substantially quadrangular inclined surface with one fourth side facing the third side as one side. When the fourth operating surface is arranged in the insertion axis direction of the insertion portion.湾曲部付医療装置は、先端側に湾曲部を設けた挿入部と、前記挿入部の基端に設けられた操作部と、前記操作部に立設し、傾倒方向及び傾倒角度が変化可能な軸部及び軸部の一端に設けられた指当て部を備え、湾曲部を湾曲させる操作を行う操作子と、を有し、指当て部は、軸部の一端に取りつけるための取付部を備える、予め定めた長さに設定した四辺で構成された略四角形形状の取付面と、取付面の第１辺を底辺にした略三角形形状の傾斜面である第１操作面と、第１辺に対向する第２辺を底辺にした略三角形形状の傾斜面である第２操作面と、取付面の第１辺に交叉する第３辺を一辺にした略四角形形状の傾斜面である第３操作面と、第３辺に対向する第４辺を一辺にした略四角形形状の傾斜面である第４操作面と、を有し、第３操作面と第4操作面とは挿入部の挿入軸方向に配列されている。
