The present invention prevents a conveying force of a rotation body from being locally deteriorated, and increases lifetime of the rotation body. A printer 1000 changes, by means of control of a controller, starting position at which rotation speeds of skew feeding correcting drive rollers 21a and 22a are changed. With this, the printer 1000 prevents a conveying force from being concentrated on specific positions of the skew feeding correcting drive rollers 21a and 22a, thereby preventing local wearing and deterioration of the conveying force, and the skew feeding correcting drive rollers 21a and 22a can be used for a long term.