The plasma processing apparatus and the shower head

A plasma processing apparatus includes a shower head that is installed within a processing chamber for processing a substrate therein so as to face a mounting table for mounting the substrate thereon and supplies a gas toward the substrate in a shower pattern through a plurality of gas discharge holes provided in a facing surface of the shower head facing the mounting table; a plurality of gas exhaust holes formed through the shower head to be extended from the facing surface of the shower head to an opposite surface from the facing surface; a multiple number of rod-shaped magnet pillars standing upright in a gas exhaust space communicating with the gas exhaust holes on the side of the opposite surface; and a driving unit that varies a distance between the magnet pillars and the gas exhaust holes by moving at least a part of the magnet pillars.