This study aimed to examine the mediating roles of warm parental behaviors between marital conflicts and behavior problems of 6-year-old children using the data from Panel Study on Korean Children(2014). The data were analyzed with Cronbach’s coefficient, descriptive statistics, frequency analysis, Pearson’s correlation analysis, and hierarchical regression analysis. The controlled variables were parents’ age, parents’ educational levels, monthly household incomes, and the gender of children. The results indicate that marital conflicts perceived by fathers were positively associated with children’s behavior problems. Fathers’ warm parenting behaviors were negatively associated with children’s behavior problems. The warm parenting behaviors of fathers played mediating roles on the relationships between marital conflicts and behavior problems of children. The same pattern was found in associations between marital conflict perceived by mothers, warm parenting behaviors of mothers and behavior problems of children. These imply that the warm parenting behaviors of fathers or mothers, even if there exist marital conflicts between them, can be a protective factor for children from developing problematic behavioral patterns. This study suggests that parent education programs need to emphasize the value of warm parental behaviors in social·emotional development of young children.