This study is aimed to examine the details of various types of parental reactions to children's aggressive behaviors, and then explore parental reactions to reduce children's aggressive behaviors through analyses of the parental reactions to influence children's aggressive behaviors. In this study, the data were collected from parents of 308 male and female 1st, 2nd, and 3rd graders in elementary schools in Seoul and Gyeonggi-do, and children's aggressive behaviors were classified as direct and indirect aggressive ones, and examined. The main results of this study are as follows. For children's aggressive behaviors, parents showed many reactions such as explanations, questions, behavioral instructions, warnings reaction mainly, and coercive and negative reactions such as warnings, instructions, physical limitations, threats, physical punishments, affection withdrawal and disappointment were done much more for direct rather than indirect aggressive behaviors. Father's bribes and the mother's behavioral instructions and physical limitations influenced direct aggressive behaviors, while mother's requests and disappointed reactions influenced indirect aggressive ones. Of parents on children's aggressive behaviors, physical reactions and authoritative control attitudes rather increases the children's aggressive behaviors, and the attitude of temporarily suspending aggressive ones by pleasing their children is not also resultingly appropriate reaction in reducing aggressive ones. Especially for indirect aggressive behaviors that appear in a non-destructive way, it is seen that gently requesting reactions are effective in reducing them.