A sputtering apparatus includes a substrate holder which holds a substrate to be rotatable in the plane direction of the processing surface of the substrate, a substrate-side magnet which is arranged around the substrate and forms a magnetic field on the processing surface of the substrate, a cathode which is arranged diagonally above the substrate and receives discharge power, a position detection unit which detects the rotational position of the substrate, and a controller which controls the discharge power in accordance with the rotational position detected by the position detection unit.