Past studies, which treated architectural space of psychiatric hospitals, discussed patients' healing environment based on long term stay in hospitals. But this study discusses therapeutic environment of psychiatric hospitals beyond the comfortable situation through the context of spatial awareness. The process of survey is divided into two stages. The first is making statistical analysis of the architectural basic data of 122 psychiatric hospitals and 141 patients' wards and their seclusion rooms, in order to obtain actual situation of the design of recent seclusion rooms. This survey has done based on plan drawings. The second is making concrete and detail design data of seclusion rooms, and obtaining evaluation of them from the view points of nurses. As a result, the discussion points for creating cure environment of seclusion rooms are found. Those are as follows; 1) Floor area, 2) Relationship between seclusion rooms and staff-station, 3) Vestibule, 4) Toilet design, 5) Observation corridor and windows.
