The South-East European Cooperation Process (SEECP) was launched in 1996, however, its functioning is an ongoing research phenomenon. This regional cooperation format includes all 13 states of South-East Europe. It was established as a forum of political dialogue and consultation, where regional issues could be addressed at the highest level. One of the objectives of the SEECP was security cooperation. The aim of this article is to analyse the role of the SEECP in maintaining security in the region of the Western Balkans. This article argues that since 1996, the SEECP has been evolving and is becoming an important format of regional cooperation in South East Europe, however, it plays a limited role in maintaining the military security of the post-conflict states of the Western Balkans. From the point of view of the members of the SEECP, military security and peace could be obtained through the integration of the participants of the SEECP, in particular those located in the Western Balkans, with the European Union and the North Atlantic Treaty Organization. The article also shows that establishing the SEECP did not eliminate tensions and riots based on ethnicity in some states of the Western Balkans and so, the SEECP still has a lot to do in the matters of reconciliation and good-neighbourliness. The article is based on primary and secondary source analysis, case study method comparative analysis, and the historical method.