Filariasis is a mosquito borne disease which caused by filarial worm. In addition, beside causing ahigh morbidity rate and socioeconomic losses, the disease may also decrease the human productivity. Thecontrol efforts have been done by vector control program, yet still not effective. This is due to a lack ofunderstanding of the biology of mosquito vector. The aim of this research was to determine diversity ofmosquitoes, density, behavior, characteristic habitat and their role of filariasis transmission. The researchwas conducted from Januari to April 2015 in Hamarung and Hukai Villages, Juai Subdistrict, BalanganDistrict, South Kalimantan Province. Collection of mosquitoes was done by bare leg bait indoor collectionmethod and outdoor collection method from 06.00 pm–06.00 am. In additon, larvae were collected in theirpotencial habitats. There were 15 species mosquitoes comprising of 5 genera i.e. genus of Culex, Mansonia,Anopheles, Armigeres, and Aedes. There were 5 dominant species of mosquitoes i.e. Cx. tritaeniorhynchus(36.80%), Cx. quinquefasciatus (29.60%), Ma. dives (11.73%), Ma. annulata (10.04%) dan Ma. uniformis(4.62%). The peak activity of Cx. tritaeniorhynchus and Cx. quinquefasciatus in both villages occurred at21.00–00.45. Based on the habitat of mosquitoes, genus of Culex, Mansonia and Anopheles were found inswamps. Mosquitoes dissection did not show any microfilaria stages (L1, L2, L3).