Even when wide angle observation with a half angle of view at near magnification observation is 40 or more, light distribution unevenness is alleviated and treatment is facilitated.An observation optical system (3) capable of switching between magnification observation and normal observation by moving a part of the lens (3c) in the optical axis direction and a plurality of illumination optical systems (4) for irradiating the subject with illumination light At least one most distal lens surface (4 e) of the illumination optical system (4) is disposed on the proximal side of the most distal lens surface (3 e) of the observation optical system (3), and the following condition The endoscope 1 satisfying the expression is provided. 0.03
