A plasma display panel(PDP) is disclosed. The PDP includes a rear plate, a front plate spaced apart and positioned in parallel with the rear plate, and a plurality of barrier ribs positioned in the space between the rear plate and the front plate to define a plurality of discharge space groups. Each discharge space group includes a first discharge space, a second discharge space, and a third discharge space. Each discharge space is filled with the different discharge gases including a first, a second, and a third discharge gas for respectively emitting of one of three primary colors. The rear plate of the PDP has a reflecting layer to reflect the light and prevent the light from penetrating through the rear plate so as to increase the luminescent efficiency of the PDP.