A PDP with superior light-emitting characteristics and colour reproduction is achieved by setting the chromaticity coordinate y (the CIE colour specification) of light to 0.08 or less, more preferably 0.07 or less, or 0.06 or less, enabling the colour temperature of light to be set to 7,000K or more, and further to 8,000K or more, 9,000K or more or 10,000K or more. The PDP is manufactured by a method in which the processes for heating the fluorescent substances such as the fluorescent substance baking, sealing material temporary baking, bonding, and exhausting processes are performed in a dry gas atmosphere, or in an atmosphere in which a dry gas is circulated at a pressure lower than the atmospheric pressure. After the front and back panels are temporarily baked, the process for bonding the panels is started while the panels are not cooled to room temperature while dry gas is circulated in the inner space between the front and back panels. This reduces the time and energy required for heating, resulting in reduction of manufacturing costs.