The purpose of this paper was to explore the differences in child-rearing attitude, parenting belief, aggression according to gender, and the effects of child-rearing practices, parenting belief on aggression among early childhood. The results of this study were as follows: 1) there were partially differences in child-rearing practices, aggression according to gender 2) for male little children, natural/intellectual achievement in parenting belief had predicted to relational aggression, or refusal attitude in child-rearing attitude had predicted to overt aggression, natural/intellectual achievement in parenting belief had predicted to overt aggression. and for female little children, refusal attitude in child-rearing attitude had predicted to relational aggression, whole/individual achievement in parenting belief had predicted to relational aggression, or refusal attitude in child-rearing attitude had predicted to overt aggression.