Head cooling aid device comprises a strip of flexible material having a series of laterally spaced air flow passageways extending completely through the width of the strip for allowing air to flow through the passageways. The image sensor produces produce image data corresponding to a presented document. The first thick section includes a first inclined section of which the thickness changes and a first thick section main body of a quadrangle column shape, and at least one slit is provided in the first thick section.