Background. In the context of effectiveness of the professional military service, individual behavior during leisure time determining overall satisfaction with life become increasingly important. Assessment of the relationship between the level of overall life satisfaction and physical fitness and healthy behaviour of soldiers in Special Forces units was the aim of this study. Material and methods. A study included 596 servicemen. Standardized psychotests were used to assess the level of life satisfaction and health behavior. Physical fitness was assessed using test trials annually performed in the Polish Armed Forces. Results. All the analyzed categories of health behavior showed a statistically significant positive relationship (p<0.05) with life satisfaction level. Life satisfaction is to the greatest extent linked to positive attitude, and in the least to health practices. No significant correlation has been demonstrated between satisfaction with life and physical fitness tests. Conclusion. Health‑promoting activities should be promoted in the army because they contribute to the overall increase of satisfaction with life. Soldiers’ mental health is a matter requiring more extensive research and in‑depth analyses. Apart from annual physical fitness tests, the subjective level of quality of life and health behavior should be assessed.