The mosquito is one of insect vector causing the serious disease of the human. One of the serious disease is Dengue Hemorrhagic Fever (DHF) because the morbidity associated with death of human. The vector of the disease is mosquito Aedes aegypti. The control method using chemical insecticide has been known as many negative effects for human as well as environment. To solving the problem the safety control method is needed. One of possible way is using bio-insecticide. Lemongrass is one of bio-insecticide was reported has repellent effect. The Repellent is the material that has an ability to protect human from mosquitoes bite. Repellent contains active ingredients that can interrupt mosquitoes ability to find their host. The pest repellent plant (PRP) as well as lemongrass have been utilizing as biopesticides for sustainable pest management. On the other hand lemongrass also was utilized as biopesticide for some fungi (Tzortzakis and Economakis, 2017). However the repellent ability test of lemongrass for mosquito in Bali is luck information, therefore the ability test of lemongrass as a repellent is necessary.