IMAGE READING APPARATUS AND LIGHT CONDENSATION MEMBER

PROBLEM TO BE SOLVED: To provide an image reading apparatus in which heat generated from a photoelectric conversion element can be dissipated appropriately while suppressing incidence of disturbance light or mixing of dust to a space between a lens and the photoelectric conversion element, and work cost required for manufacturing can be reduced.SOLUTION: A light condensation member 10 includes a barrel 11 which shields the space between a lens 1 and a photoelectric conversion element 4a from the outside. The barrel 11 consists of a member 11a where the incidence side of the lens 1 is formed into substantially cylindrical shape, and a member 11b where the exit side of the lens 1 has a square shape opening wider than the outer shape of the photoelectric conversion element 4a, with both members molded integrally of resin, and is disposed to cover the photoelectric conversion element 4a with its square enclosure. Out of the square enclosure, both side faces facing each other in the longitudinal direction have concave shape 1b so that a gap is formed between a substrate to which the photoelectric conversion element 4a is fixed.