The purpose of this study was to investigate the relative importance of children's family impact perceived by mothers on children's problem behaviors. Children's family impact was concep- tualized which mothers evaluated the impact of their child in five dimensions: financial burden, mother's attitude toward their child, restriction of mother's social activity, disagreement about parenting, and husband's support. Subjects of this study consisted of 370 preschool children's mothers drawn from five child-care centers in Cheong-ju City and three in Chung-ju. The pilot study was used to examine the applicabi lity of survey instrument. Data were analyzed by the frequency, percentage, Person correla- tion, and stepwise regression through SPSSWIN program. The results were as following : 1. Restriction of mother's social activity and mother's attitude toward child were significant factors predicting children's aggressive behaviors. 2. Mother's attitude toward child and disagreement about parenting between mother and father were significant factors predicting children's internalizing anxiety. 3. Restriction of mother's social activity, mother's attitude toward child, and lack of husband's support were significant factors predicting children's immature behaviors. 4. Mother's attitude toward child, disagreement about parenting between mother and father, and restriction of mother's social activity predicted children's disobedient behaviors. 5. Mother's attitude toward child and restriction of mother's social activity was significantly predicting children's inattention behaviors. 6. Children's problem behaviors was explained by mother's attitude toward child, disagreement about parenting between mother and father, and res triction of mother's social activities. The research suggests that mother's attitude toward child was the strongest factor to predict children's problem behavors followed by restriction of mother's social activities, and disagreement about parenting between mother and father. Only for children's immature behavor was related to lack of husband's support perceived by mothers. The implications of this research was discussed in several ways.