The purpose of this study is to clarify the changes in life stage of the dwellers in a suburban detached housing area in the Tokyo metropolitan area and the trends of their intergenerational living. The residential style and family networks among middle-aged couples and their aged parents are focused on in view of today's aging society and extended life span. The results are as follows : 1) The ratio of couples with parents still living is 80.0-100.0%, 47.8% and 22.2% for couples aged 50-64, 65-69 and 70-74 respectively. Many of those parents are widows, many of whom have lead their widowhood for a long period of time. 2) In this residential area, there was an increase in intergenerational households 10-15 years after development of the area. The reason is that some couples began to take in their aged parents who had been living in other areas. 3) As their parents advanced in age and/or lost their partners, the mutual support and interactions between the surveyed couples and their parents changed into the unilateral support by the couples to the parents and interactions between the two. Noteworthy is those couples born and raised into the Tokyo metropolitan area living near their parents in that their support and interactions with parents are more active than their counterparts from other areas. Thus it is clear that in the suburban detached housing area the changes in the household composition and life-style patterns of middle-aged residents are affected by their parents' aging.