PROBLEM TO BE SOLVED: To reduce the size and the cost of an endoscope.SOLUTION: An endoscope has: an image sensor 33 that is disposed in a distal portion 15 of an insertion portion, and has an imaging area 41 covered with sensor cover glass 43 a lens 93 to focus incident light from an imaging subject on the imaging area 41 and a bonding resin 37 that fixes the lens 93 and the sensor cover glass 43. The lens 93 comprises a single lens formed with an external shape being prismatic, whose first surface on the imaging subject side has a plane and whose second surface on the imaging side has a convex surface. An optical element part in a central portion having a convex curved surface which protrudes in a substantially spherical shape constituting a lens surface of the convex surface on the imaging side of the lens is formed integrally with a peripheral edge part having a bonding plane whose end surface is a plane.SELECTED DRAWING: Figure 13COPYRIGHT: (C)2017,JPO&INPIT【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、挿入部の先端部15に、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、を有し、レンズ93は、外形形状が角柱状に形成され、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、レンズの撮像側において、凸面のレンズ面を構成する略球面状に隆起した凸曲面部を持つ中央部の光学素子部と、端面が平面の接着面を有する周縁部のコバ部とが一体的に形成されている。【選択図】図13
