An image reading apparatus includes an image reader unit that has a plurality of light receiving elements for reading an image on an original, and moves relative to a frame for applying a pressing force to a read-target surface of the original; and a driven roller that is rotatable, comes into contact with the original, and moves relative to the frame and independent of the image reader unit in a direction in which the image reader unit applies the pressing force to the original, thereby applying a pressing force to the original independent of the image reader unit.