The current study investigated the effectiveness of religious psychotherapy in relieving symptoms of aggressive behavior in primary school students. The study is a quasi-experimental research which adopted a pre-test, post-test, and retention- test treatment Control group design .A pilot study were conducted on 10% of the subjects. The study was limited to all the 50 primary school pupils at ghirnata school, in Al-jouf Governerate Area of sacaca. This study was conducted over a period of 3 months starting from October 2010 to 30th., December 2010. The population consisted of all primaries 5 and 6 pupils in this school. The identified 50 pupils were grouped into study group(experimental) and a Control group (25 subjects each). After Pre- test was done, A program of Islamic religious psychotherapy was applied for study group (experimental) subjects, After completing the program, post assessment was done. After post test one month, retention assessment was done for both study and a Control groups. The used tool was Aggression-Problem Behavior Frequency Scale; Five null hypotheses tested at 0.05 level of significance were raised to guide the study.