The purpose of this study was to examine the mediating effect of young children's self-control in the relationship between mother's affectionate parenting․ psychological․behavioral control and young children's problem behaviors. The subjects of this study were 368 mothers whose young children were 3 to 5years old and attending to 3 private kindergartens and 2 child-care centers located in Chunkbuk. Data were analyzed by frequency, percentage, Primary factor analysis, Cronbach's α, t-test, F-test, Pearson's correlation, and hierarchical regression, using the SPSS 12.0 program. The results of this study were as follows: First, young children's self control partially mediated when mother's affectionate parenting affected young children's internalizing and externalizing problem behaviors. Second, young children's self control partially mediated when mother's psychological control affected young children's internalizing and externalizing problem behaviors. Third, young children's self control did not show a mediating effect on the relationship between mother's behavioral control and young children's internalizing and externalizing problem behaviors. In conclusion, young children's internalization of mother's psychological control and behavioral control as well as affectionate parenting have its effect on problem behaviors.