PROBLEM TO BE SOLVED: To provide an endoscope reducing a diameter of a forefront portion of an insertion part in which an imaging window causing the imaging light to enter is provided, while retaining sealability of the insertion part.SOLUTION: An endoscope includes: a substantially cylindrical lens holder 16 provided at the insertion part a lens barrel housed in a barrel hole of the lens holder an optical lens held by the lens barrel a substantially cylindrical cover member 19 attached to an inner wall at the distal end of the barrel hole of the lens holder 16 and an optically-transparent cover glass 21 closing the distal end of the cover member 19.COPYRIGHT: (C)2015,JPO&INPIT【課題】挿入部の封止性能を維持しつつ、撮像光を入射させる撮像窓が設けられた当該挿入部の最先端部の小径化を実現した内視鏡を提供する。【解決手段】内視鏡は、挿入部に設けられた略筒状のレンズホルダ16と、レンズホルダ16の筒孔に収容された鏡筒と、鏡筒に保持された光学レンズと、レンズホルダ16における筒孔の先端側の内壁に取り付けられた略筒状のカバー部材19と、カバー部材19の先端側を閉鎖する光透過性のカバーガラス21とを備えた構成とする。【選択図】図2
