An aging method and an aging device are provided by which a plasma display panel that reduces the generation of irregular color and that has a high display quality can be obtained. An aging method and an aging apparatus for plasma display panels are disclosed which enable to obtain a plasma display panel with high display quality wherein color irregularities are suppressed. The aging apparatus for plasma display panels comprises a plurality of fans. When air is blown to a plasma display panel using the fans during aging of the plasma display panel, at least the direction or the amount of air blow by at least one of the fans is changed so that the temperatures of image display regions in the plasma display panel can be uniform, thereby suppressing color irregularities.