The purpose of this study was to investigate the features of behavioral thermoregulation and thermal environment in children with disabilities. In the first survey, we measured axillary temperature and physical activity in eight children with disabilities. We also measured the room and clothing climates for each child. Physical activity level was low in children with Down syndrome. The physical activity level affected the values of the different measurements. Results of the second survey, which was a questionnaire administered to 441 guardians of disabled children, indicated that many disabled children, but not those with hearing impairment, and had poor thermoregulation ability.