The purpose of the present study was to investigate the seven functions of private space (Tomari & Yoshida, 1998a) with respect to affect and use of place. Five hundred and eighty-six under-graduates completed a questionnaire concerning affect, use of place and the functions of private space. The major findings were as follows: (1) Depressive feelings and irritation were positively related to both the need for space for changing one's mood and introspection. (2) Outdoor spaces can function as places allowing introspection and self-change; spaces to be alone, allowing tension reduction and change in mood. These results suggest that place can be actively used to achieve the functions of private space according to one's emotional state.