Background: Cartoon violence causes several behavioural, cognitive, and psychological effects among primary school children especially during their early developmental years. Aim of the study: This study aimed to assess the correlation between cartoon violence, aggressive behavior and psychological well-being among primary school children. Research question: What is the correlation between cartoon violence, aggressive behavior and psychological well-being among primary school children?. Design: A descriptive correlational research design was utilized in this study. Setting: This study was conducted at selected governmental primary schools in Benha city only at Qaliubiya Government. Sample: A multistage random sample of (400) students was taken from the previously mentioned setting by taken randomly one grade from selected schools then taken all students from these grades.  Tools: Tool (1): A structured Interviewing Questionnaire Sheet, Tool (11): Attitude scale for children toward cartoon violence, Tool (111): Aggression scale for children and Tool (V): The stirling children's wellbeing scale. Results: Findings reflected that more than three quarters of the studied primary school children had a positive attitude toward cartoon violence and more than half of them had severe level of aggression while less than half of the studied children had low level of total psychological wellbeing. Conclusion: There is a highly statistically significant negative correlation between mean scores of total attitude toward cartoon violence, total psychological wellbeing and total aggression among the studied primary school childern. Recommendation: Psycho-educational program need to be organized by the government and professional organizations for parents and guardians on the influence of media violence on children social behavior and their psychological development.