1. An endoscope apparatus comprising: an illumination unit which selectively provides a white light and a plurality of additional lights, each of the plurality of additional lights having a different wavelength band; a sensing unit which receives light reflected from a body cavity, the sensing unit generating a color image captured by the white light and a plurality of images of different wavelength bands captured by the plurality of additional lights having different wavelength bands; and an image processing unit which generates synthesized images by combining the plurality of images of different wavelength bands generated by the sensing unit.