PURPOSE: To miniaturize and lighten a reflector unit by providing the reflector unit where reflectors are fixed so that reflected light beams are mutually cross to an optical picture reader.

CONSTITUTION: Reflector fixed boards 21 are inserted from both ends of a central shaft 22 and tighten by nuts for central shaft fixing 23 from both ends of a central shaft 22 from an external-side. Then, spring boards 25 for fixing six surfaces of the reflectors excluding an incident surface and a projection surface are fixed to one reflector fixed board by vises at six places. Thus, six reflectors 24 are inserted between the spring boards 25 which are thus fixed and the reflector fixing boards 21 so that the reflecting surfaces face an internal- side and the spring boards 25 of the other end are fixed by the vises 26, whereby the reflectors are completed. Thus, the reflector unit can be miniaturized and lightened by constituting the reflectors in such a way that reflected light beams are respectively cross.