Abstract: An apparatus for inputting an image, includes a principal optical system on which a light beam corresponding to a single image is incident; light beam separating means for separating the light beam which passed through the principal optical system into a plurality of light beams; optical receiving and divided image group forming means for receiving the plurality of light beams, respectively, and forming divided image groups, each of said divided image group corresponding to the received light beams; and an image generating means for generating said single image by combining said divided image groups with one another. The single image is composed of the divided images. The number of the divided images is not less than that of the plurality of light beams. Each of the divided image groups has one or a plurality of divided images not adjacent to one another. The optical receiving and divided image forming means have imaging devices corresponding to the divided images, respectively.