Abstract
Filed investigations on indoor air pollution caused by fungi and mite allergen were conducted in 13 nursery schools in Tokyo. The results showed that fungi and mite allergen in the nursery schools were lower than these in the houses measured in the previous studies. The result showed that no significant differences in fungi and mite allergen between temperture, relative humidity and floor materials in this study. To analyze the factors which increase fungi, mite allergen and quantification method I was carried out with the results of the questionnaire survey. It was identified that the effets of materials was large on both fungi and mite allergen.