An endoscope is provided that obtains a favorable field of view. The endoscope includes: an illumination window that protrudes from an end surface of an insertion unit； an observation window that protrudes from the end surface； and an outlet that protrudes from the end surface and emits water or air to the observation window, and satisfies Formulas (1) and (2). C≥；D . . . (1) 2N≥；C . . . (2) C is a maximum protruding amount of the observation window the end surface of the insertion unit. D is a maximum protruding amount of the illumination window from the end surface of the insertion unit. N is a maximum protruding amount of an inner surface of the outlet from the end surface of the insertion unit.
