An original is inclined with respect to an optical axis of a camera until the camera is positioned outside a reflected-image taking range by inclining a mounting surface of an original glass on which the original is placed. This makes it possible, when the original is taken by the camera, to prevent the camera from being reflected on the original and being taken in with the original. An imaging case formed of a diffusing member that is made of a high light-diffusing material or a high light-absorbing material is arranged in the reflected-image taking range. This makes it possible to prevent an object positioned in the reflected-image taking range from being reflected on the original and being taken by the camera. Consequently, clear image information can be more reliably obtained.