PROBLEM TO BE SOLVED: To prevent the color of an observation image from being changed even when the image of a main subject is captured from a remote or a near place.SOLUTION: An endoscope system includes: an electronic endoscope 12 which includes a solid state imaging device 58 mounted in the distal end part 26 of the endoscope 12 and an illumination part 42 disposed adjacent to the solid state element 58, and which, when the distal end part is inserted into a body cavity of a subject, illuminates the subject in the body cavity with illumination light emitted from the illumination part 42 and captures the image of the subject using the solid state imaging device 58 illumination means 53, 100, 101, 102, 103, 104 which generate illumination light in which three primary color lights being the red light, the green light, and the blue light are mixed, and which emits the illumination light to the subject from the illumination part and a control means 82 which increases the intensity of the illumination light in the color of a light quantity becoming smaller compared with the light quantities of the other colors among the respective colors of the red light, the green light, and the blue light when the intensity of the illumination light is changed, or which reduces the intensity of the illumination light in the color of a light quantity becoming larger compared with the light quantities of the other colors.
