The objective of this study is to determine the relation between the level of commitment of secondary school teachers and their students’ level of belongingness at the schools. The study is composed of five main chapters: research, introduction, theoretical framework, technique, findings and comment and conclusion, discussion and suggestions and relational scanning model is used. In 2013-2014 academic year in Beylikdüzü, Istanbul, data has been collected by giving two different questionnaires to 265 teachers and 816 students picked by accessible sampling process model in order to determine the perception of the teachers about the level of commitment, to determine the level of their commitment and to determine the level of the students’ belongingness and four different assessment tools have been used. Demographic features of the teachers are on the first part of the first questionnaire and Organizational Commitment Scale of Teachers is on the second part. Students’ demographic features are on the first part of the second questionnaire and the level of belongingness of the students is on the second part. The collected data has been analysed by percentage, frequency, hierarchical regression analysis, One-way ANOVA and correlation. According to the data that has been collected, as the socio-economic level changes, the belongingness of the students and the teachers has not changed. The data has shown that the belongingness of both students and teachers has nothing to do with the level of socio-economic level.