Abstract
This research considered influence of indoor environment about how aged deterioration of panel painting is advancing in the inside of a cultural property building. As a result, it turned out that the panel painting of the Kobuntei-okugoten was subject to strong influence from environment which is high humidity and the ultraviolet rays by sunlight. However, aged deterioration of a panel painting resulted in the conclusion that it was subject to big influence also from maintenance and directions for use. Therefore, containing the other degradation factors is future issues.
