The purpose of this study is to clear the district characteristics of aging trends of population and need for the pair dwelling. Ube city is selected as an example for the study. 19 primary zones are classified into five districts by cluster analysis. By the significance remainder test of need and district elder and middle age generations living in suburban district have a wish of pair dwelling and the pople living in central districts have one of separation. Need is discriminated by household type and lyfe style. Households of pair dwelling wish to live together and receive care at home and separated households wish to live by themselves or the hospital for old people. And old people that life style is base life, society and spirit life type wish to live together and whose people life is action type wish to live separately.