A PDP (plasma display panel) and a plasma display device are provided which are capable of improving a light-emitting characteristic and of realizing high image quality by incorporating a discharge electrode using a low-resistance conductive material. In the above PDP, connecting electrode portions each being arranged in the vicinity of a transparent conductive portion of a scanning electrode and a transparent conductive portion of a sustaining electrode, where sustaining discharge is made to occur for displaying of images, have a slender-line shape and their film thickness being comparatively small in order to decrease a light-shielding rate and low-resistance conductive portions each being arranged in a portion being comparatively far from each of transparent conductive portions have their film thickness being comparatively large in order to lower wiring resistance.