The purpose of the present study was to determine the relationship between role clearness and occupational commitment of branch team managers in Tehran Agricultural Bank. Research questions were provided and developed considering role theory, existent resources toward role, present job description. The opinions of branch team managers in Tehran Agricultural Bank according to demographic variables like: sex, age, marital status, experience and education level were studied. This research was descriptive and correctional type in the side of research method and the side of goal was the kind of applied researches. Research population was 227 of branch team managers in Tehran Agricultural Bank districts in 1389 year. The method of sampling was “classified random sampling” sample size included 150 persons. For data gathering questionnaire of role clearness and questionnaire of occupational commitment were used. For data analysis, both descriptive and inferential statistics containing (Spearman correlation coefficient) were used and the conclusions and recommendations were extracted. Result: Findings indicate that there are significant relationships between role clearness and job commitment among of branch team managers in Tehran Agricultural Bank.