A method of manufacturing a plasma display panel that includes a front panel including a substrate, a display electrode formed on the substrate, a dielectric layer formed so as to cover the display electrode, and a protective layer formed on the dielectric layer; and a rear panel disposed facing the front panel so that discharge space is formed and including an address electrode formed in a direction intersecting the display electrode, and a barrier rib for partitioning the discharge space. Forming the protective layer on the front panel includes: vapor-depositing a base film on the dielectric layer; forming an aggregated particle paste film containing an aggregated particle of a plurality of crystal particles of metal oxide on the base film; and firing the base film and the aggregated particle paste film, thereby attaching a plurality of the aggregated particles on the base film.