Luminance is important subject for the color plasma display. In a color plasma display, the phosphor is white and reflection of phosphor is produced by incident rays from outside. For this reason if the level of the reflective light of a phosphor becomes large compared with self luminescence of a phosphor, contrast will fall. Although there was also a method of using an optical absorption filter for the front of PDP panel for the improvement in contrast, it was difficult to maintain contrast enough only by this method. For this reason the luminance of the PDP panel needed to be improved. In this research, analysis and examination were performed about the relation of the luminance of PDP, and discharge gas, and the relation of luminance and PDP panel structure. Consequently, the effective composition contributed to luminance became clear about the discharge gas composition and panel structure. Based on this research result, the information color plasma display was developed and was produced.