This study examined the effect of job stress on employee’s performance in the Commercial Banking Sector Nigeria. It was carried out to investigate the effect of work stress on employee performance in some sampled commercial banks in Nigeria. The population of the study is made up of four sampled commercial banks in Nigeria. The banks include: Access bank Plc, First Bank of Nigeria Plc, Fidelity Bank Plc and Zenith Bank Plc. Result indicated that there is a strong positive correlation between strategies adapted to control and reduce stress and employees performance. The data presented and analyzed were based on findings from the questionnaire distributed to the employees of the four banks. The researchers distributed 250 copies of the questionnaire to the respondents. Out of the 250 copies of the questionnaire distributed, 212 were properly filled and found relevant for the study, while the remaining 38 copies of the questionnaire were either not properly filled or misplaced by the respondents. This shows a response rate of 85 percent. Likert-type items on a five point scale and open-ended questions were employed to measure the perceptions of the respondents on the effects of stress on employee performance in some sampled banking sector in Nigeria. Data obtained are presented using the tabular format, and analyzed using percentage method. From the analyzed data, chi-square statistical technique was used to test the hypotheses. The study concluded that workplace stress among employees must be handled with utmost seriousness if productivity of the organization is to be increased at any point in time since only healthy workers can contribute maximally to the growth and development of the work organization. The study recommended that the management of Nigerian Commercial Banking Industry as a matter of necessity should contrive a new method of job allocation to employees in order to prevent workload. The study recommended that banking sector should ensure that there are regular workshops and conferences on stress management among workers in the Nigerian banking sector.

Key Words: Work Stress, Employees Performance, Commercial Banking sector, in Nigeria