PROBLEM TO BE SOLVED: To appropriately secure an output region for illumination light, and to suppress a reduction in an illumination region even when a diameter of an insertion portion is reduced, and corners of a distal end peripheral edge are chamfered in an endoscope illuminating through an optical transmitting path.SOLUTION: An endoscope 1 having an insertion portion 3 in which corners of a distal end peripheral edge are chamfered includes: outer tubes 13, 14 that form an outer circumference of the insertion portion a translucent distal end cover 22 that forms at least the distal end peripheral edge in the insertion portion and an optical transmitting cable 42 that is provided inside the outer tubes and guides light from a light source to a distal end of the insertion portion. The distal end cover includes a front surface 22a formed by chamfering and a rear surface 22b located on an outer tube side, and concave parts 35, 36 having a concave surface are formed on at least one of the front surface and the rear surface. An output end 42a of the optical transmitting cable is arranged to face the concave part, and illumination light output from the distal end cover is diffused to the outside.COPYRIGHT: (C)2014,JPO&INPIT【課題】光伝送路を介して照明を行う内視鏡において、挿入部を小径化し且つその先端周縁の角を面取りした場合でも、照明光の出射領域を適切に確保すると共に照明領域の縮小を抑制する。【解決手段】先端周縁の角が面取りされた挿入部3を有する内視鏡1において、挿入部の外周を形成する外筒13,14と、挿入部における少なくとも先端周縁を形成する透光性の先端カバー22と、外筒内に配設され、光源からの光を挿入部の先端に導く光伝送用ケーブル42とを備え、先端カバーは、面取りによって形成された前面22aと外筒側に位置する後面22bとを有し、それら前面および後面の少なくとも一方には凹面をなす凹部35,36が形成され、光伝送用ケーブルの出射端42aが凹部に向けて配置された構成とし、先端カバーから出射される照明光を外側に拡散させる構成とする。【選択図】図2
