Miniaturization, reduce the cost in the United States Patent endoscope. An endoscope includes an imaging device 33 to the imaging surface 41 is covered with the element cover glass 43, a lens 93 for focusing incident light from an object on an imaging plane 41, a lens 93 and the element cover glass 43 the adhesive resin 37 to fix the, has the objective cover glass 91 which covers the subject side of the surface of the lens 93, the objective cover glass 91, the thickness TGt is 0.1mm TGt 0.5mm, refractive index ndF but 1.3 ndF, Abbe number dF is is 30 dF, element cover glass 43, the thickness SGt is 0.1mm SGt 0.5mm, refractive index ndR is 1.3 ndR 2.0, NDF NDR, an Abbe number NyudR is 40 dR, dF dR, lens 93, the first surface of the object-side plane, the second surface of the imaging side is constituted by a single lens having a convex surface, the focal length f is 0.1mm f 1.0mm, F-number FNO is 1.4 FNO 8.0.FIELD 13【課題】内視鏡において小型化、コスト低減を図る。【解決手段】内視鏡は、撮像面41が素子カバーガラス43によって覆われる撮像素子33と、被写体からの入射光を撮像面41に結像するレンズ93と、レンズ93と素子カバーガラス43とを固定する接着用樹脂37と、レンズ93の被写体側の面を覆う対物カバーガラス91と、を有し、対物カバーガラス91は、厚みTGtが0.1mm≦TGt≦0.5mm、屈折率ndFが1.3≦ndF、アッベ数νdFが30≦νdFであり、素子カバーガラス43は、厚みSGtが0.1mm≦SGt≦0.5mm、屈折率ndRが1.3≦ndR≦2.0、ndF≦ndR、アッベ数νdRが40≦νdR、νdF≦νdRであり、レンズ93は、被写体側の第1面が平面、撮像側の第2面が凸面を有する単一レンズにより構成され、焦点距離fが0.1mm≦f≦1.0mm、FナンバーFNOが1.4≦FNO≦8.0である。【選択図】図13
