A method of manufacturing a plasma display panel including a sealing step of arranging a front plate formed with a display electrode, a dielectric layer, and a protective layer on a transparent substrate and a rear plate formed with an address electrode, a barrier rib, and a phosphor layer so as to face each other and sealing a periphery of the front plate and the rear plate with a sealing material, where the sealing step includes a sealing material application step of applying the sealing material to the rear plate, a tentative firing step of tentatively firing applied sealing material, and a sealing step of arranging the front plate and the rear plate so as to face each other and sealing the plates by softening and melting the sealing material, and the sealing material is configured by a glass frit having bismuth oxide.