PROBLEM TO BE SOLVED: To provide an endoscope having a structure which allows an improvement in the durability of a built-in object of a bending piece.SOLUTION: The endoscope includes: a bending part freely bendable provided to an insertion part to be inserted into the body of a subject a plurality of bending pieces 120a-120s structuring the bending part whose central axis C is positioned along the longitudinal axis direction N of the insertion part while bending pieces adjacent to each other along the longitudinal axis direction N are connected so as to be rotatable via rotary axes 18a and 18b and a channel 51 positioned in the plurality of bending pieces 120a-120s. At least one pair of the rotary axes 18a for causing all the plurality of bending pieces 120a-120s to bend towards a specific direction in response to a rotation sandwich the central axis C in the radial direction R of the bending pieces 120a-120s, while each rotary axis is deviated from the central axis C in the radial direction R. Thereby, the distance between a specific portion of the inner peripheral surface of each bending piece and the channel 51 is defined to be a set interval.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2017,JPO&INPIT【課題】湾曲駒の内蔵物の耐久性を向上させることのできる構成を具備する内視鏡を提供する。【解決手段】被検体内に挿入される挿入部に設けられるとともに湾曲自在な湾曲部と、湾曲部を構成するとともに、中心軸Cが挿入部の長手軸方向Nに沿って位置し、長手軸方向Nに沿って隣接する駒同士が回動軸18a、18bを介して回動自在となるよう連結された複数の湾曲駒120a~120sと、複数の湾曲駒120a~120s内に位置するチャンネル51と、を具備し、複数の湾曲駒120a~120s全体を回動に伴い特定方向に湾曲させる少なくとも1組の回動軸18aは、湾曲駒120a~120sの径方向Rに中心軸Cを挟むとともに径方向Rにおいて中心軸Cからそれぞれずれて位置していることにより、湾曲駒の内周面の特定部位と、チャンネル51との距離が設定間隔に規定されている。【選択図】図2
