Introduction: Workers in health sector are exposed 5 times more workplace violence as compared to workers in other sectors. Their consequences can range from mild to severe, affecting the victim, quality of services and orga-nization. The objective is to evaluate the effectiveness of educational intervention on workplace violence among healthcare workers in health clinics. Methods: This study is a single blinded cluster randomized trial to see the ef-fectiveness of education intervention on coping with workplace violence involving 10 cluster clinics with total 82 respondents in each control and intervention group. Data was collected using pretested questionnaire at baseline, 1-month and 6-months post intervention. The analysis used were descriptive, compared mean at baseline, repeated measures of variance and Mixed Model. Results: Response rate 94% at 1-month due to loss to follow up. Majority of the respondents were female (82.3%), and Malays (83.5%). The prevalence of workplace violence was 27.4% and mostly involved psychological violence (95.6%). There were no significant different between control and interven-tion group characteristic at baseline. Repeated measures MANOVA test was conducted to test intervention effect on dependent variables. The results until 1-month time showed significant difference between intervention and control group on combination of the dependent variables over time in coping (F(1,162)=9.51, p=0.002, and η2=0.06), knowledge (F(1,162)=10.47, p=0.001, and η2=0.061) and confidence (F(1,162)=15.65, p