In a plasma display panel having a discharge gas sealed in a gap between a front side substrate and a rear side substrate opposed to each other and having ribs partitioning a gas-sealed space into a discharge cell array arranged above an inner surface of one of the substrates, the rib includes an upper-layer rib and a lower-layer rib, and the upper-layer rib and the lower-layer rib are made of rib materials different from each other in resistance to etching, thereby allowing for formation of high ribs to enlarge the discharge space without affecting the upper-layer ribs when forming the lower-layer ribs.