The purpose of this study was to find out the actor effect and the partner effect in relation to spousal support, job support, work-family spillover, and work-life balance in dual-earner couples. The subjects of this study were 176 dual-earner couple, whose youngest children are under the age of 16 and who work over 15 hours each week. The research tool was a questionnaires. Factor analysis, Cronbach's ${\alpha}$, correlation analysis, and APIM were performed for the data analysis. The main results of this study as follows. First, for both wives and husbands, perceived spousal support had a positive actor effect on work-life balance. However, perceived husband's spouse support for wife's support had positive partner effect on the wife's work-life balance, the wife's perceived spousal support for her husband' did not have a partner actor effect on the husband's work-life balance. Second, for both wives and husbands, job support had a positive actor effect on work-life balance. In addition, the wife's job support had a positive partner effect on the husband's work-life balance, however, the husband's job support did not have a partner actor effect on the wife's work-life balance. Third, for both wives and husbands, work-family conflict had a negative actor effect on work-life balance. In addition, the wife's work-family conflict had a negative partner effect on the husband's work-life balance, however, the husband's work-family conflict did not have a partner actor effect on the wife's work-life balance. Fourth, for both wives and husbands, work-family enrichment had a positive actor effect on work-life balance. In addition, the husband's work-family enrichment had a positive partner effect on the wife's work-life balance, however, the wife's work-family enrichment did not have a partner actor effect on the husband's work-life balance.