PROBLEM TO BE SOLVED: To provide an endoscope system for eliminating the change of a hue in an observation image even when the image of a main subject is captured from a long/short distance.SOLUTION: An endoscope system includes: an electronic endoscope 12 where a solid-state imaging device 58 is mounted on a distal end part 26 and also an illumination part 42 is arranged adjacent to the solid-state imaging device 58, and that illuminates a subject in a body cavity by illumination light to be emitted from the illumination part 42 when the distal end part 26 is inserted to the body cavity of the subject and captures the image of the subject with the use of the solid-state imaging device 58 illumination means 53, 100, 101, 102, 103, 104 for generating illumination light where lights three primary colors, i.e. red light, green light, and blue light are mixed and emitting the light to the subject from the illumination part and control means 82 for increasing the illumination light intensity of a color with a light amount smaller than the light amounts of the other colors among the red light, the green light, and the blue light or decreasing the illumination light intensity of a color with a light amount larger than those of the other colors when the illumination light intensity is changed.
