Objective: The present study was conducted to identify the components of evaluating the effectiveness of in - service training courses for employees of the Refah Bank. Methods: The research method was qualitative - purpose - based and was qualitative as the data type. The statistical population of the study consisted of experts, specialists, and knowledgeable persons in evaluating the effectiveness of in - service training courses. The research tools included semi - structured interviews whose validity and reliability was confirmed. The method of data analysis was theoretical coding derived from the method of data fundamental theory. Results: The findings of the study showed that the criteria for evaluating the effectiveness of in - service training courses for employees of the Refah Bank include individual, group, organizational, and social factors. And the affecting factors the effectiveness of in - service training courses include demographic characteristics, training programs, support of managers, educational goal setting on the bank, and professionalism. Conclusion: Based on the findings of the research, the results indicated that to evaluate the effectiveness of in - service courses for employees of the Refah Bank, special attention should be paid to various individual, group, and organizational components