An endoscope processor is used in combination with a scanning type endoscope capable of scanning an object by swinging an optical fiber that transmits illumination light supplied from a light source portion and displacing an irradiation position of the illumination light, and includes: a photodetection portion configured to detect return light from the object irradiated with the illumination light and generate and successively output a photodetection signal according to the detected return light； an image generation portion configured to generate an observation image of the object based on the photodetection signal； and a determination portion configured to determine whether or not the illumination light emitted through the optical fiber is intensively radiated to a minimum area, based on a magnitude of dispersion of brightness in the observation image.
