Adolescence is a transitional phase between childhood and adulthood with a marked period of significant caries activity. Efforts to overcome this problem can be overcome throught health education approach. However, conventional health education that has been applied only focuses on increasing patient awareness of the severity of a disease problem by providing information or advice, this approach in motivating patients is still considered ineffective. Motivational interviewing counselling technique to increase patients intrinsic motivation in changing behavior. The purpose to produce a motivational interviewing counselling module as a guideline for dental health promotion and analyze the effectiveness of MI counselling in increasing adolescent oral health self- efficacy. The research method used is Research and Development (R&D) and test model using quasi- experiment design (pre and post with control group design). The research sample was divided into 2 groups, namely 40 intervention and control groups. The data were tested using intraclass correlation coefficient, Paired t- test, Independent t-tes, Man Whitney, and Wilcoxon. Result: MI counselling is relevant as a model of dental health education(p=0,006). Besides, it is more effective to increase adolescent self-efficacy (p=0,011) and decreasing plaque index score (p=