A control unit is connected to an illuminating/photographing unit including a camera, an infrared light source and a visible light source, and a storage unit including an image storage unit. The control unit includes an image processing unit. The image processing unit includes a combining unit that combines a fluorescence image acquired by the illuminating/photographing unit and a visible light image, a determination unit that determines whether division in running of the blood vessel exists or not, and a coloring unit that performs coloring of a different color for each blood vessel area determined to be divided at the determination unit with respect to the blood vessel.
