The study aimed to define the reasons and features of the aggressive behavior for the students of level tenth in the Sultanate of Oman, it suggested the processing methods in order to reduce the aggressive behavior among the students in the school, the study related to the quality research pattern, a sample of the study has been chosen from the society intentionally and selecting one school only included with its administration, ten students, parents and the teachers, then the meeting sessions have been held with the sample in the school office, after that the behavior of the students has been noticed inside the school yards, playgrounds, cafeterias, during their arriving and departing school, also when they get on the school bus. The study has revealed many reasons that lead the students to commit the aggressive behavior such as: the wrong methodologies in the social upbringing, exposing to watch the violence and the difference of the economical levels .One of the most important result in the research is that: it discovered the greatest common type the aggressive behavior which is the verbal and body aggression and in addition to that most of the aggressive students find it very difficult to create social relationship with their partners, not only that but also they suffer the weakness in their educational levels, the study also the valuable recommendations and clear proposals for the future studies according to the current study.