Abstract
This study aims to clarify the conditions of stocks and residents of the old and decaying public housing development that had developed by local government and public corporation within 1960-1970's by the case study of typical suburban city "Machida city". First, we show the development history of the series of public housing developments in Machida city and its position in Tokyo metropolitan area. Then we analyze 1;the condition and problems of the plan and space of old and decaying public housing development, 2;the compositions of household and age and its changes of the residents by analyzing the resident register. Lastly we study the measures of each public institution for old and decaying public housing.