IMAGE SENSOR UNIT AND IMAGE READER USING THE SAME

PROBLEM TO BE SOLVED: To provide an image sensor unit for reducing illuminance unevenness without increasing the number of components.SOLUTION: The image sensor unit includes: a light source for reflection light 15 for radiating bills S; a substrate 14 on which the light source for reflection light 15 is mounted; a light guide body for reflection light 16, which guides light radiated from the light source for reflection light 15 to the bills S; a rod lens array 18 which image-forms the light from the bills S; a light receiving element 19 for receiving the light from the rod lens array 18; a sensor substrate 20 on which the light receiving element 19 is mounted; and a frame 13 storing the substrate 14, the light guide body for reflection light 16, the rod lens array 18 and the sensor substrate 20. The sensor substrate 20 includes a passage hole 20a and is arranged on a bill S side rather than the substrate 14. In the frame 13, the light guide body for reflection light 16 is arranged in a state where it is inserted into the passage hole 20a. Thus, the light from the light source for reflection light 15 passes through the passage hole 20a and radiates the bills S.