The purpose of this study was to determine the relationship between ethical climate, perceived organizational justice and teachers’ job involvement with the mediation role of professional ethics. The research method is descriptive-correlation based on Structural Equation Modeling. All teachers of the secondery School of Tabriz, (1692) were the population of the study. Cluster sampling was performed. 320 people completed the questionnaire. To collect the data, questionnaires of organizational justice, Niehoff (2001), ethical climate, Fritsch (2000), job involvement, Kanungu (1982), professional ethics Shell and Bateman (2004) were used. Validity was assessed using confirmatory factor analysis, and all of them have good fit. The results show that ethical climate, perceived organizational justice, job involvement and professional ethics are related. Also professional ethics has a mediation role between job involvement and some dimensions of ethical climate and organizational justice. Teachers and senior managers of educational arena, with morals and creating of calm climate and fair distribution of the benefits and reconsideration of distribution procedures would provide teachers job involvement. Results showed that teachers and senior managers in the field of education can provide a moral and calm climate, and fair distribution of benefits and a revision of distribution practices, which will cause teachers' engagement and engagement