Objectives This study aimed to explore the relationship between parenting attitudes and aggression in children and adolescents using a meta-analysis. To this end, parenting attitudes were classified into positive and negative groups, and their effect sizes were compared. In addition, differences in the relationship between parenting attitudes and aggression in children and adolescents according to subtype of aggression and age were verified.
 Methods Effect sizes of 106 were calculated from 43 studies conducted from 2000 to 2022. There are 6 categories of positive parenting attitudes,11 categories of negative parenting attitudes, 6 categories of aggression, and 3 categories of age. To calculate the effect size, the correlation coefficient r was converted to Fisher's Z. Using R, average effect size, heterogeneity and moderating effect verification, and publication bias were calculated.
 Results First, the effect size of the positive parenting attitude had a negative (-) value, and the effect size of the negative parenting attitude had a positive (+) value. Overall, sub-factors of negative parenting attitudes were more strongly related to aggression than those of positive parenting attitudes. Second, among parenting attitudes, affection (-) and responsiveness (-) had strong negative correlations with aggression, and psychological control (+) and coercion (+) had strong positive correlations. Third, among the types of aggression, overt aggression showed a strong correlation with both positive and negative parenting attitudes. Fourth, as for age, positive parenting attitudes showed strong effect sizes in elementary lower graders (-), while negative parenting attitudes showed strong effect sizes in elementary higher grades (+).
 Conclusions Based on the aforementioned findings, the relationship between the parenting attitude and aggression was specifically confirmed, and the moderating effect of age could be verified. These findings are anticipated to be helpful information for parents considering strategies to prevent or lessen aggression in their children.