Disclosed is a method of manufacture for a plasma display panel comprising a sealing step wherein a front panel (2) and a rear panel (10) are disposed facing each other and sealed with a sealing material, and a venting step wherein a gas is vented in an electrical discharge space at a temperature at or above the softening point of the sealing material. The sealing step includes a heating step wherein heat is applied repeatedly and incrementally with a temperature maintained for a time period in a temperature range wherein a gas containing impurities adsorbed by a protective layer (9) detaches therefrom, and a gas influx step wherein a drying gas is flowed into the discharge space (16) such that positive pressure results therein.
