An endoscope apparatus includes: an illumination unit that sequentially radiates illumination light of three colors of RGB onto a subject an image acquisition unit that captures the illumination light reflected at the subject a control unit that controls the image acquisition unit so as to sequentially capture the illumination light of the three colors and so as to capture the illumination light of at least one color other than G, a plurality of times for different exposure times, thereby causing the image acquisition unit to acquire component images of the three colors a dynamic-range expanding unit that generates an expanded component image by compositing the plurality of component images of the at least one color and an image generating unit that generates a colored endoscope image by compositing the expanded component image of the at least one color and the component images of the other colors.
