There is provided an image sensor in which an enlargement of a substrate width is not caused even in a case that a rod-shaped light source is provided on both sides of a resin lens plate, respectively, and in which a positional accuracy of component is superior. The image sensor comprises a rod-shaped light source for irradiating light to an original placed on an original glass plate, an imaging optics for focusing light reflected on the original, and a light-receiving element for receiving light passing through the imaging optics, the light-receiving element being positioned at a predetermined location on a substrate which is provided with through holes for terminals of lead frames of the rod-shaped light source. The terminals of lead frames of the rod-shaped light source are bent toward the center of the substrate to be connected with the through holes.