Background: This study is to evaluate the effectiveness of health education in the change of community's knowledge - practice in prevention of Dengue Hemorrhagic Fever (DHF) at Bao Vinh Commune, Long Khanh Town, Dong Nai Province. Objectives: Identify the proportion of community who have the proper knowledge - practice of DHF, identify the proportion of community who get access to health education activities on the prevention of DHF pre - and post-intervention. Methods: This is a community intervention study.