An imaging section of an image reading apparatus is mainly constituted of an image forming lens unit, a lens barrel, a holder plate and a CCD area scan sensor. The image forming lens unit is held in the lens barrel that is mounted to a bottom side of the holder plate. The CCD area scan sensor is mounted on a top side of the holder plate. Piezoelectric elements are mounted on the holder plate, for moving the imaging section in two directions that are orthogonal to each other, and 45 degrees to film lengthwise and widthwise directions respectively. For the pixel shift, the image forming lens unit is moved together with the CCD area scan sensor, so the required accuracy of movement is not so strict.