This research aims at present to detect the relationship between school social behavior and self-concept among a sample of students in Second graders secondary, and the study of the differences between the gender (male and female) in the search variables (school social behavior, self-concept). And the research community schools of secondary education governmental organizations in the area Sehnaya, who are students of second grade secondary school (15-17 years), have been withdrawn sample randomly, which amounted to (90) students (45 males + 45 females), and the researcher used the following tools: 1 – a measure of school social behavior, 2 - self-concept scale, after that she has tested Validity and reliability, The researcher followed the descriptive analytical method so as to its relevance to the nature of the research،she has developed a set of hypotheses and Results came as following:1- There is a statistically significant relationship between the school social behavior and self-concept among the sample search.2- There were statistically significant differences in the school social behavior depending on gender for the sample of the male.3- There are statistically significant differences in self-concept depending on the gender for the sample of the male. In light of these findings researcher presented a set of proposals the most important was further studies and research on the school social behavior and its relationship to some psychological variables in the various educational stages (elementary, university) and the need to develop outreach programs designed to give teenagers the proper methods to learn correct school social behaviors and that lead to develop a positive self-concept.