The purpose of this study is to investigate the effects of perceived social supports by friends and parents on psychological well-being in a life transition. In addition, the levels of ideal as well as present social supports are examined, and it is investigated whether the more social supports they have than they wish, the more effects they have on psychological well-being. Subjects are 165 freshmen (48 males and 117 females). Whether they had a life transition or not are based on their states of residence, i.e. living with parents or alone after getting into a university. Major findings are as follows: (1) Both social supports have an effect on psychological well-being, especially loneliness. That is, thoes having more social supports feel less lonely than thoes with less support.(2) The level of loneliness is determined by friends' social support, mostly emotional support.(3) The more social supports they have than they disire, the less lonely they feel and the more satisfied with their university life they are.