The purpose of the present invention is to provide an endoscope with a reduced diameter. To this end, this endoscope comprises: an optical member (106) in which a plurality of plate-shape members (104) are fixed, the plurality of plate-shaped members being layered coaxially and each comprising a first window (101) through which light that forms an optical image is transmitted, a first light shielding part (102) which is formed on the outer circumference of the first window, and a second window (103) which is formed on the outer circumferential side of the first light shielding part and through which illumination light is transmitted； and a cover member (112A) comprising an imaging part (110) which is disposed opposing the first window at a first end of the optical member and by which the optical image is formed, an illumination part (111) which is disposed opposing the second window on the outside in the outer circumferential direction of the imaging part and which emits the illumination light, a third window (114) corresponding to the first window on the side of a second end opposite the first end, and a second light shielding part (113) which is formed on the inner circumferential edge of the third window and which corresponds to the first light shielding part, the cover member being configured to surround the outer circumferential surface of the optical member such that the third window and the second light shielding part are disposed at a position opposing the second end of the optical member.Le but de la présente invention est de fournir un endoscope avec un diamètre réduit. A cet effet, cet endoscope comprend : un élément optique (106) dans lequel une pluralité d'éléments en forme de plaque (104) sont fixés, la pluralité d'éléments en forme de plaque étant disposés de manière coaxiale et comprenant chacun une première fenêtre (101) à travers laquelle une lumière qui forme une image optique est transmise, une première partie protection contre la lumière (102) q
