Purpose -This study aims to explore the influence of retention factors (compensation, job characteristics, training & development opportunities, supervisor support, and career opportunities) on employee's commitment (affective , normative and continuance commitment). Approach/Designs- This research is a descriptive and analytical study. Survey data were drawn from different commercial banks located in Kathmandu valley of Nepal. Findings - The statistical results indicated that there was significant relationship between retention factors and employees' commitment. The correlation results shows, except the supervisor support the correlation among all the affective commitment variables are found positive, which indicates that supervisor support has no influence on the employees' commitment, whereas other variables have influence on the employees' commitments. On the other hand, there were significant relationship between career opportunities and affective, normative and continuous commitment of employee in Nepalese commercial banks. Implication – This study argued that the only factor has career opportunities impact on employees' commitment in Nepalese commercial Banks.