Patent ID: 8049937

Claim:
An image sensor unit comprising: a sensor board with a plurality of photoelectric conversion elements mounted thereon; an original illuminating light source; an imaging element for focusing light reflected from an original onto the sensor board; and a frame for holding the sensor board, the original illuminating light source, and the imaging element, wherein the imaging element comprises a plurality of rod lens arrays each having at least one cut end in a lengthwise direction, and cut portions of the rod lens arrays are connected to each other to be tailored to a predetermined reading width, the frame comprises a holding section for holding the rod lens arrays, and the holding section comprises a bottom surface widened at a part where a cut portion and/or a connection portion of the rod lens arrays is located and comprises a burr clearance section provided on the side of each of two wall surfaces of the holding section along the wall surface to extend from the widened part of the bottom surface toward an upper end.