On october 2005, in Depok occured chikungunya outbreaks that attack 200 citizen at Cinere, Limo Sub District, Depok City. This study purpose is to know the impact of sosidemographic and enviromental factor on chikungunya outbreaks at Cinere, Limo Sub District, Depok City. Research design is case control study. The number of case group and control group is 118 patient. Factor studied are education, knowlwdge, house density, age, occupation, sex, mobility, anti-mosquito chemical, existance of mosquito-larva, container, and wire netting. The result of the study suggest that there are three variabels that involved in chikungunya outbreaks, namely education (OR=1,9: 1,12-3,23), age (OR= 2,1: 1,22-3,46), and house density (OR=2,2: 1,25-3,80). Multivariat analysis showed that the most dominant factors are house density, and followed by education. Probability of chikungunya outbreaks is 2,1 for low house density and low education.