The purpose of this study is to compare the time use of urban housewives 1980 and 1990, and to investigate significant variables affect to the time spent, the independent effect of variables to the time use of her them. For this purpose, the data from 261(1980) and 287(1990) were analyzed. The major findings are follows: 1. There was 3-4 hours decreasing for household work in 1980 & 1990, and the significant variables were age, number of children, years of youngest child, education, type of kitchen, and type of heating, but in 1990, number of children and education of housewife. 2. In 1990, the independent effect of variables to household work time are number of children, years of youngest child, and cooking fuel to household work time and income to physiological time.