When a document cover in a closed position is opened, a lower end of a rear cover of the document cover may horizontally push a hung portion of an electric cable inside an image reading apparatus. If a rectangular edge of the lower end contacts the horizontal portion directly, the electric cable containing the horizontal portion may be damaged. Therefore, arc-like projections are formed on the lower end of the rear cover such that the projections contact the horizontal portion. According to this configuration, the damage of the electric cable can be suppressed.