In the goal of determine the impact of circumcision in transmission of HIV in military area. A retrospective study has been carried out from January 2000 to December 2005 at the infirmary of Genie military garrison about all HIV positive serology registered in that structure. It was a study of circumcised militaries and uncircumcised militaries as control group. Among 1183 militaries, 1102 were men (93.2%). Among these 1102, 57 were HIV positive (5.1%). Among 1102 military, 154 were uncircumcised and among them 20 were HIV positive (12.9 %). Among 948 of circumcised militaries 37 were HIV positive (3.9%). Circumcision reduces the risk of infection by HIV; however it has to be considered as supplement among other prevention methods.