Introduction: health promoting behaviors are one of the main criteria for determining human health and the way to achieve a better quality of life. The aim of this study was to evaluate the status of health-promoting behaviours and related factors among nurses in selected military hospitals.

 Material and methods: This research was a cross-correlation study that carried out on 400 clinical nurses working in AJA hospitals in Tehran The subjects were recruited by multi-stages random sampling method. Data was collected by using international health promoting behaviours (HPLP-II) questionnaire, and then analyzed through descriptive and analytical statistics by SPSS software (version 21).

 Results: 93.8% of nurses did not smoke. Average rate of health nurses score older than 45 years was 113.2±2.41.that was the lowest score among the age groups. They had BMI 24.48±4.1. At least once a year, 80% of them were aware of their health status. But among them, the highest percentage (19.5%) of reported illnesses related to musculoskeletal disorders (low back pain and foot). the lowest mean score in physical activity is obtained (13.88±4.53). one-way ANOVA test was used to investigate the differences between the marital status and different shifts. The T test showed significant differences between smokers and non-smokers’ health scores. Mean of total health-promoting behaviours was 133.79± 18.55. ANOVA test did not show significant difference in mean health –promoting behaviours in terms of the variable domains of the degree and type of ward.

 Discussion & Conclusion: The mean score of health-promoting behaviors among nurses in this study indicate that their exposure is at acceptable level. The need for health education programmes with an emphasis on physical activity among them is essential.