PROBLEM TO BE SOLVED: To provide an optical lens that allows an endoscope to be downsized easily.SOLUTION: There is provided an optical lens for an endoscope made of glass whose refractive index is 1.65 or more.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2018,JPO&INPIT【課題】内視鏡を小型化しやすい光学レンズを提供する。【解決手段】屈折率が1.65以上のガラスからなることを特徴とする内視鏡用光学レンズ。【選択図】図1