PROBLEM TO BE SOLVED: To provide an endoscope whose nozzle can be enlarged without enlarging diameter of a distal end section of an insertion section in spite of its structure with mutually independent air duct and water duct provided on a distal end face of the insertion section, and further, providing the endoscope capable of surely guiding water injected from the nozzle to an objective lens side in spite of its structure with a concave portion formed to sustain water force injected from the nozzle on the periphery of a distal end opening of the water duct.SOLUTION: This endoscope includes: an air duct 25 and a water duct 26 which are mutually independent ducts provided in an insertion section 12 an objective lens 20 a concave portion 22 for attaching nozzles with a water flow guiding inclined face 23 which allows backward recessed amount from the objective lens side to the water duct side to be gradually increased a water supply nozzle 34 for injecting water discharged from a front end opening of the water duct toward the water flow guiding inclined face and an air nozzle 39 for guiding air flow discharged from the front end opening of the air duct to the objective lens side passing through a position immediately before the water flow guiding inclined face.COPYRIGHT: (C)2013,JPO&INPIT【課題】挿入部の先端面に互いに独立した送気管路と送水管路を設けた構造でありながら、挿入部の先端部の径を大きくすることなくノズルを大型にでき、さらに送水管路の先端開口の周縁部にノズルから噴射された水の勢いを持続させるための凹部を形成した構造でありながら、ノズルから噴射された水を対物レンズ側に確実に導くことが可能な内視鏡を提供する。【解決手段】挿入部12内に互いに独立した管路とした送気管路25及び送水管路26と、対物レンズ20と、対物レンズ側から送水管路側に向かうにつれて後方への凹み量を徐々に大きくする水流案内傾斜面23を有するノズル取付用凹部22と、送水管路の前端開口から排出された水を水流案内傾斜面に向けて噴射する送水ノズル34と、送気管路の前端開口から排出された空気流を水流案内傾斜面の直前位置を通過させながら対物レンズ側に導く送気ノズル39と、を備える。【選択図】図5
