Introduction: Higher education is expected to nurture more mature, ethical, and professional people in the community. As university professors can play an effective role in institutionalizing desirable ethical behaviors in students, the importance of a model for the professional ethics of university faculty members becomes more prominent. This study aims to design a model of behavioral and ethical Codes of faculty members of Iranian universities. Method: This research is fundamental and Survey-based. In this research, a semistructured interview consisting of 10 questions was designed. The study was implemented in 1400. Using the snowball sampling model, online interview sessions were arranged with university professors all over Iran. The researchers were saturated with 13 interviews, and 3 more interviews were Conducted to ensure more. Each interview was analyzed through MAXQDA2020 software and extracted using the grounded theory method with the Glasser and Strauss approach, coding, grouping concepts, and final model of ethical and behavioral Codes. Findings: 9 main categories of the model of behavioral and ethical Codes of university faculty are: authenticity (central phenomenon), learner, determination and purposefulness (causal conditions), problem-solving skills, effective communication skills, Team Building Skills (strategies), scientific competence (mediating conditions), adherence to rules and normability (context) and learning leader (outcome). Conclusion: The difference between this research and other previous studies is the attention to authenticity that is shown in the model as the main concept. Also in the designed model, the concept of a learning leader is considered as the main role of university faculty members.