An image reading apparatus having an improved cover device. The image reading apparatus includes a main body having an upper surface on which a manuscript can be placed, a cover installed at an upper portion of the main body to cover the manuscript when scanning, and a pressing plate movably installed in the direction perpendicular to an upper surface of the cover at an inner portion of the cover so as to press the manuscript. In addition, an elastic member is additionally inserted between the pressing plate and the cover.