An image-forming apparatus having an image-forming unit, a fixation unit for fixing a toner image transferred to paper, a double-sided print conveyance path for conveying the paper imprinted on one side toward the image-forming unit, a decurling unit for passing the paper discharged from the fixation unit in a double-roller nip including a hard roller and a soft roller and decurling the paper, a rotation unit for rotating the decurling unit, and a calculation unit for calculating an amount of toner deposited on each of a first side, which is the side printed first, and a second side, which is the side on the reverse of the first side and is the side printed next. The rotation unit rotates the decurling unit on the basis of calculation results from the calculation unit.