Today, one of the most important variables in the success of organizations is the professional ‎ethics of managers. Observance of the principles of professional ethics by managers is more ‎important than other institutions and organizations due to the public position and special ‎responsibilities of the judiciary power. The purpose of this study is to design a model of ‎professional ethics for managers with a governance approach. The present study is a mixed ‎and development-applied research. In the qualitative stage, 25 academic experts and the ‎judiciary were interviewed in depth, and after analyzing the data with the grounded theory ‎method, a paradigm model of research was designed. Finally, the validity of the research ‎model was assessed by structural equation modeling and PLS software with a survey of 182 ‎managers and experts of the judiciary. Based on the research findings, 6 dimensions of ‎individual, interpersonal, managerial, professional, value and belief and special judicial ‎dimension and to promote the professional ethics of managers with a good governance ‎approach in the judiciary, strategies at job levels, Managerial, organizational and extra-‎organizational were determined. Also, the value of the coefficient of determination for the ‎professional ethics variable was 0.591, for the strategies variable 0.719 and the outcome ‎variable was 0.655, which are all appropriate values. The professional ethics of managers in ‎the judiciary is a multidimensional phenomenon and is closely related to the principles of ‎good governance, and to promote it, a set of strategies at different levels must be done.‎