PROBLEM TO BE SOLVED: To achieve downsizing and cost reduction in an endoscope.SOLUTION: An endoscope includes: lenses L1, L2, L3； an image pickup device 33 which has a square outer shape with one side having a length identical with a length of a diameter of the lenses L1, L2, L3； a device cover glass 43 which covers an imaging surface 41 of the image pickup device 33 and has a square outer shape having one side with a length identical with the length of one side of the image pickup device 33； a transmission cable 31 connected to the image pickup device 33； illumination means provided along the lenses L1, L2, L3 and the transmission cable 31； and a tubular and flexible sheath 61 covering the lenses L1, L2, L3, the image pickup device 33, a part of the illumination means, and the transmission cable 31. The lenses L1, L2, L3 in which optical axes of the lenses L1, L2, L3 are conformed to each other and the device cover glass 43 are fixed on a center of the imaging surface 41 with an adhesive resin 37.SELECTED DRAWING: Figure 11【課題】内視鏡において小型化、コスト低減を図る。【解決手段】内視鏡において、レンズＬ１，Ｌ２，Ｌ３と、外形状が正方形であり、その一辺の長さがレンズＬ１，Ｌ２，Ｌ３の径の長さと同一の撮像素子３３と、撮像素子３３の撮像面４１を覆い、外形状が正方形であり、その一辺の長さが撮像素子３３の一辺の長さと同一の素子カバーガラス４３と、撮像素子３３に接続された伝送ケーブル３１と、レンズＬ１，Ｌ２，Ｌ３及び伝送ケーブル３１に沿って設けられた照明手段と、可撓性を有しレンズＬ１，Ｌ２，Ｌ３、撮像素子３３、照明手段の一部及び伝送ケーブル３１を覆う管状のシース６１と、を備え、撮像面４１の中心にレンズＬ１，Ｌ２，Ｌ３の光軸を一致させたレンズＬ１，Ｌ２，Ｌ３と素子カバーガラス４３とが接着用樹脂３７により固定される。【選択図】図１１
