An endoscopic system includes an endoscope including: a light source of illumination light that illuminates inside of a test subject an illumination light exit, from which the illumination light is emitted and an objective optical system configured to form an image of the inside of the test body illuminated by the illumination light. The endoscopic system further includes: regular reflection light detection means configured to detect blown-off highlights in an image formed by the objective optical system and illuminance distribution changing means configured to change illuminance distribution of the illumination light when blown-off highlights are detected. The endoscopic system can reduce interference by blown-off highlights due to regular reflection during observation with the endoscope.
