This study was conducted to examine degrees of health promoting behaviors and social support in solders and to identify the relationship between health promoting behaviors and social support in solders. In this descriptive, correlation study, 300 soldiers who were in the military service at one of the divisions of a metropolitan city were completed a questionnaire including the Health Promoting Lifestyle Profile and the Social Support Scale. The data was analyzed with the average, percentage, t-test, ANOVA, and Pearson's Correlation Coefficient in SPSS WIN 19.0. The results of the study are as follows: The majority of solders had good health status (76%), but 26.3% reported that they had a disease. In addition, 73% of participants voluntarily applied the army. The average of degree of social support promoting behaviors was 102.7(13.96)(range 54-139). The average of degree of social support was 63.3(9.13)(range 31-75). Higher economic status (F=1.23, p<.05) and better health status (F=1.23, p<.001) were associated with higher degree of health promoting behaviors. In addition, participants who made sure of the pathways after discharge (F=1.23, p<.001) were positively associated with higher degree of health promoting behaviors. Level of health state was significantly associated with degree of social support (F=1.23, p<.01). Health-promoting behaviors were correlated with social support from family (r = .32, p < .001), friends (r = .39, p < .001) and fellow soldiers (r = .43, p < .001). The results of this study show the relationship between health-promoting behaviors and social support. Because fellow soldiers are the most available social support group for the soldiers, it is necessary to enhance the social support system with peers in the army.