PDP (1) includes front plate (2) and rear plate (10). Front plate (2) has protective layer (9). Rear plate (10) has phosphor layers (15). Protective layer (9) includes protective layer magnesium oxide and calcium oxide, and exhibits three peaks in a range from not less than 340 eV to not greater than 355 eV of a binding energy spectrum in a binding energy analysis of protective layer (9) by X-ray photoemission spectroscopy.