Introduction: Since human resources and employees are one of the most important assets of organization, identification of factors associated with these resources that can affect their performance and job stress is becoming increasingly important to study.The present study examined the relationship between job stress and the performance of different health units.
Methods: The present study is a cross-sectional study.All of the health care workers of urban and rural health centers in Hamadan city were included in this study.The study population included 150 people and all of them were examined.The questionnaires included the Stress Relief Elliot(1994)and an annual checklist provided by the Ministry of Health.The data analyzed in SPSS software with Pearson and independent –T test.
Results:  The mean of stress level and performance were55.16, 79.64 which respectively was 55.14, 78.21in family Health unit, 57.06 and 76.87   in Disease control unit and 54.03, 83.31in Occupational and Environmental Health unit respectively.The results showed that the significant and negative relationship between employees stress and performance of units (p=0.001).The results also showed that age had a significant positive correlation with service history and performance (p =0.001) and negative significant relation with stress (p =0.001).
conclusion: Regarding the confirmation of relationship between stress level and staff performance that shown in this study, and the fact that human resources are the key factor in determining the quality, accessibility and cost of health care, it is recommended that managers take effective actions for reducing stress and increasing productivity planning.