Sakane et al.[3] administered a questionnaire survey to Osaka City apartment residents in September 2012 to assess parameters of living environments, air-conditioner use, and sleep quality. Results revealed that the sleep quality of full time workers is affected by ‘residential heating and cooling performance’, ‘solar heat from windows’,
and the air-conditioner use frequency during the day. This study reveals relations of sleep and air-conditioner use in respondents who spent a long time at home. The study purposes are 1) extraction of the differences of relation between residential thermal performance and sleep quality by air-conditioner use, and 2) extraction of differences in distributions of responses to items according to air-conditioner use.