PROBLEM TO BE SOLVED: To provide an endoscope configured to enter illumination light applied from an illumination window to an observation window without lowering washing/disinfection properties of a distal surface or observation properties by the observation window.SOLUTION: The endoscope includes: an observation window 20 provided at a distal surface 11s of an endoscope insertion section to be inserted into a subject for observing the subject an illumination window 30 provided at the distal surface 11a and applying illumination light to the inside of the subject and a light-shielding wall W having such a shape as to expose a peripheral edge 20g of the observation window 20 to the outside, between the observation window 20 and the illumination window 30 in a radial direction K of the endoscope insertion section, and projected to a same surface M as an exit plane 30a of the illumination window 30g located at a peripheral edge 30g side of the illumination window 30, in an insertion direction S of the endoscope insertion section.SELECTED DRAWING: Figure 3COPYRIGHT: (C)2018,JPO&INPIT【課題】照明窓から照射された照明光が観察窓に入光してしまうことを先端面の洗浄消毒性や観察窓による観察性を低下させることなく実現することができる構成を具備する内視鏡を提供する。【解決手段】被検体に挿入される内視鏡挿入部の先端面11sに設けられた、被検体を観察する観察窓20と、先端面11sに設けられた、被検体内に照明光を照射する照明窓30と、内視鏡挿入部の径方向Kにおける観察窓20と照明窓30との間において観察窓20の周縁部20gを外部に露呈させる形状を有するとともに、照明窓30の周縁部30g側に位置する、内視鏡挿入部の挿入方向Sにおいて照明窓30の出射面30aと同じ面Mまで突出された遮光壁Wと、を具備する。【選択図】図3
