Plasma display panel and plasma display device

A plasma display panel comprising:

• a first substrate;
• and
• a second substrate arranged in opposition to the first substrate and forming a discharge space in which a discharge gas has been sealed between the first substrate and itself,
• the first substrate comprising:
• a plurality of first bus electrodes and a plurality of second bus electrodes provided by turns, a first discharge electrode provided so as to be connected to each of the first bus electrodes, and a second discharge electrode provided so as to be connected to each of the second bus electrodes, and
• the second substrate comprising:
• a plurality of third electrodes provided so as to intersect the first and second bus electrodes,
• wherein:
• the main discharge for a display is caused to occur between the first discharge electrode and the second discharge electrode;
• a plurality of fourth electrodes are provided at the portions where the main discharge between the first discharge electrode and the second discharge electrode is caused to occur;
• and
• when seen in the direction perpendicular to the first and second substrates, the first discharge electrode and the second discharge electrode are in opposition to the edge of each of the fourth electrodes and at least one of the distance between the fourth electrode and the first discharge electrode in opposition to each other and the distance between the fourth electrode and the second discharge electrode in opposition to each other changes gradually in a cell.