Diversity of class Demospongiae in the Boka Kotorska Bay (Montenegro, Adriatic Sea) is presented with 2 subclasses, 25 families and 46species. Among them six species are Mediterranean endemics and 12are under protection by national and international legislation. This paper is a compilation of already published literature and recently collected data. The information was collected on 33 locations around the Boka Kotorska Bay. According to the literature 38species are distributed in the area, while personal data confirm the presence of eightspecies new for the area. Fauna of Porifera in the Boka Kotorska Bay is still partially known, although new data are constantly acquired and further studies are necessary for better assessing the sponge diversity in this area.