A plasma display panel (PDP), consisting of a front panel (10) equipped
with display electrodes (8) and a rear panel (4) equipped with address
electrodes (3), that displays an image by causing discharge in a small
discharge space formed between the two panels; wherein there are provided
two layers of protective films (5, 6), made of metallic oxide, covering
the dielectric layer (7) installed on the front panel (10); the outer,
upper layer (6) being formed into a layer of material with a specific
surface area of 20 m.sup.2 /g or more and a film thickness of 1 .mu.m or
less, exhibiting a high discharge characteristic; and the inner, lower
layer (5) being formed into a layer of material with a specific surface
area of 10 m.sup.2 /g or less and a film thickness of 1 .mu.m or more,
exhibiting a low water-adsorption characteristic.
