This study will track the change of the characteristics of residential space of residents moved in the Disaster Restoration Public Housing and clarify how the change has affected the social "isolation" of residents. We made a questionnaire survey on the residents in the Public Housing in Kobe City. Clarified points are as follows: 1. Isolation process corresponds to the situation which people lost familiar environments such as their old home, interaction with neighborhood and fun in their life. 2 It is remarkable that many people who reluctantly moved into the disaster restoration public housing have been isolated. Most of them have been still attached to the town and home which they used to live. 3. Single elderly households who live in the higher floor level of large scale housing estate tend to be isolated. 4. It is found the tendency of polarization between residents who isolated and who not isolated in the disaster restoration public housing located in suburban and waterfront areas. 5. In the case that residents have lived far away from the place people lived before the earthquake, isolated residents cannot regenerate social relations and its situation has been fixed.