Background: Nursing is known as a profession with a high level of stress. This occupational stress has an adverse effect on the health and abilities of nurses in the workplace. This study aimed to determine the occupational stressors among nurses of a military hospital.

Materials and methods: This cross-sectional descriptive study was conducted among the nurses of a military hospital selected by census sampling in 2016. Data were collected by the Expanded Nursing Stress Scale (ENSS) questionnaire. Then, the analyses were performed using descriptive and inferential statistical tests in SPSS software.

Results: The findings showed that 70.23% of nurses had a moderate stress level. Psychological factors, physical factors, and social working environment were identified, respectively, as stressors among nurses. The absence of physician in an emergency situation has been reported as the most influential statement of occupational stress among this group. It is necessary to mention that occupational stress level of nurses had a significant relationship with work experience (p=0.030) and wards of hospital (p=0.001).

Conclusion:  In summary, with full recognition of occupational stressors, managers can provide a background of preventing burnout and promoting the health among nurses.