Dengue fever (DF) and dengue hemorrhagic fever (DHF) are caused by the four serotypes of dengue virus, type 1 to 4 belonging to the flavivirus family. Dengue viruses are transmitted principally by Aedes aegypti that breeds in water containers. This diseases are endemic and cause periodic or annual outbreaks in Indonesia. The occurrence of DHF outbreaks is linked to a number of factor including the density of mosquito vectors. Another entomological aspect such as vector resistance and trans-ovarian transmission phenomenon will be discused in this manuscript. This entomological survey was base on previous and concurrent with dengue vector resistance studies in endemic area in Central Java Province. The aim of this study were to explore the entomology data such as larval-free index, Containers Index, House Index, and Breteau Index. The entomological data was collected using resting mosquito colection technique in the morning and larval survey according to WHO guideline. The study was conducted in 8 endemic areas in Central Java i.e : Jepara District, Blora District, Semarang City, Surakarta City, Tegal City, Magelang City, PurwokertoCity and Salatiga City. The study revealed that the larval-free index in eighth areas ranged between 24,13% to 88,52%, lower than the national standard of 95%. The result of Container Index, House Index and Breteau Index ranged from 11,84 % to 75,16% ; 11,48 % to 75,86 % and 14,73% to 100 % respectively. The population of Ae. aegypti collected from 8 endemic area in Central Java eleven municipalities, regencies/cities in Central Java Province were resistant to Malathion 0,8 %, Bendiocarb 0,1 %, Lambdasihalotrin 0,05 % and Permethrin 0,75 %, including Deltamethrin 0,05 % and Etofenprox 0,5 %. However, in several location of this study were found the population of Ae. aegypti remain susceptible to Cypermethrin 0,05 % and Bendiocarb 0,1 %. The population of Ae. aegypti from Salatiga and endemic area from Central Java have shown the trans-ovarian transmission of dengue virus. The trans-ovarian transmission phenomenon was occured in several DHF endemic areas in Central Java Province.