The purpose of this study was to examine children's experience of witnessing domestic violence and their domestic violence experience in an effort to determine the influence of the ego-resilience, family support, friend support and teacher support factors of children exposed to family violence on their psychosocial adjustment. The subjects in this study were the boys and the girls who were in their fifth and sixth grades in two different elementary schools in the city of Gimhae, South Gyeongsang Province. After a survey was conducted, the answer sheets from 255 respondents were analyzed. The findings of the study on the hypotheses were as follows: First, whether there would be any differences among the children in psychosocial adjustment according to sociodemographic characteristics was analyzed. As a result, the children's psychosocial adjustment significantly varied with their academic standing. And their academic standing factor had a statistically significant negative correlation with their ego-resilience and the levels of family support, friend support and teacher support. Second, a multiple regression analysis was made to investigate how the ego-resilience of the children exposed to domestic violence and their social support system including family support, friend support and teacher support affected their psychosocial adjustment. And the levels of family support and friend support had an impact on psychosocial adjustment. In other words, more family support and more friend support led to better psychosocial adjustability. Third, when a correlation analysis was made to look for connections among the variables, the children's ego-resilience had a quite statistically significant positive correlation with the three variables of the social support system that were family support, friend support and teacher support. Given the findings of the study, there are some suggestions on child welfare: First, counseling and psychotherapy should be provided when a child is found to have been exposed to domestic violence, and the child should be helped to correct his or her negative self-awareness and to efficiently cope with stress caused by the experience. And cooperation with local community and case management are both added if necessary. Second, a peer relationship program should be offered for the child to keep being on good terms with his or her peers, as more friend support served to bolster psychosocial adjustability. Besides, a variety of intervention and programs should be provided to improve sociability. Third, the kind of educational environments that enable teachers to keep track of children in their classes should be prepared, because they aren't likely to notice it even if there is any child who is exposed to domestic violence. And the sort of system that allows teachers to entrust the child to the school social worker if necessary should be built. Fourth, a wide range of programs geared toward boosting family function should be prepared, as children's psychosocial adjustability becomes better when they find themselves to be in good relationship with their families and to be fully supported by them.