This dissertation concerns the impact of the refugees flows on the security of the host State. Such impact was investigated through bibliographic research and the study of case of the Big Lake region, located in Central Africa. Taking as referencial the security of the governements of this States, the analysis identified that such fluxes could configures an economic, political and/or cultural threat, depending of the specific context of each State. It was also identified that the issues related with refugees generate an interdependence between the States of the region in their concerns about security, showing an regionalist dynamics.