Introduction: this study has been implement fed to examine ranger training on military morale of a ranger training course of a military unit.Method: a questionnaire on military morale was given to trainees before the implement fation of ranger training course. Military Morales were measured at end of the course. The reliability of military morale was a 0.823. The data were analyzed with spss software in descriptive and inferential levels (including variance analysis and t. test).Results: the results show that ranger training course has generally enhanced military Morales of learners, but this increase at level of p<0.05 is not significant. However, after ranger training, learners military morale's in the aspects of supporting leadership, social cohesion and team work increased at level of p<0.05, while acceptability, leadership style, leader- follower relations, leadership skills, organizational satisfaction, organizational identity, organizational interest, organizational commitment, efficacy, compatibility, bravity, comparative skills, effectiveness after training have been increased but this enhancement at level of p<0.05 is not significant.Discussion: this study indicated that 69.8 percent of participants of pretest have low military morales but 30.2 percent have high military Morales. It indicates that ranger training increases military morale of participants. The results also show that military morale percentage in posttest has doubled in comparison with pretest.Furthermore, the cases of low and lower military Morales are vanished. Though the results of main assumption showed that military Morales of trainees have increased in the post test but this increase is not significant.