This study investigated how the characteristics of Korean American mothers, their husbands, their children, and their families affected their parenting self-efficacy, using a sample of 113 Korean American mothers in the U. S. This study made use of questionnaires based on the studies by Choe and Chung (2001), Shin (1007), Lee and Song(1991), and demographic characteristics. The results of the analysis indicated that the mothers' parenting self-efficacy subscales were correlated positively to the husband's support, the social support, the mothers' educational attainment, and the husbands' educational attainment, and correlated negatively to the children' age, the mothers' depression, the mothers' age, and the husbands' age. Multiple regression indicated that the husbands' support was the strongest predictor of Korean Mothers' parenting self-efficacy.