The present invention provides a technique relating to a PDP and capable of canceling or reducing luminance unevenness due to voltage drop or the like. In a structure of the PDP, for example, two types of cells different in discharge timing are arranged in a zigzag manner on a screen. For example, the two types of cells have different discharge gap lengths because of a difference in areas and lengths of projections of electrodes of the respective cells. By the dispersion of discharge timings of cells, the voltage drop or the like is reduced. The design characteristic obtained by the arrangement pattern is superimposed on panel manufacture characteristic, whereby luminance unevenness is cancelled or reduced in display characteristic.