Introduction: The purpose of this study was to investigate the prevalence of psychiatric disorders among the soldiers referring to the medical commission.Methods: A cross-sectional descriptive retrospective study was conducted on the patients referring to the psychiatric commission in a military center in during 2007-2013. For data collection a researcher-made questionnaire was used. It was completed by using archives and records. The final diagnosis was according to at least three psychiatric viewpoints and DSM IV-TR diagnostic criteria. Data was analyzed by SPSS 18 software via descriptive statistics.Results: In investigating the variable of psychiatric causes, in all exemption cases respectively: personality disorders (51.4%), neurosis (21%), mood disorders (15.2%), psychosis (4.2%), mental retardation (5.4%) and other causes (2.8%) were reported. In outpatient group: personality disorders (52.8 %), neurosis (21.8%), mood disorders (14.3%), psychosis (3.5%), mental retardation (5.4%) and other causes (2.2%) were reported. On the other hand, in inpatient group: mood disorders (50.2%), personality disorders (20.4%), neurosis (16.3%), psychosis (6.1%), mental retardation (5.4%) and other causes (1.6%) were reported.Conclusion: Due to the high prevalence of mental disorders and their disability in the society, appropriate screening before starting the service and periodical mental health monitoring during the military service should be considered.