Backgrounds and Objectives: Oral disease may lead to pain and teeth loss, a condition that affects appearance, quality of life, nutritional intake, and consequently the growth and development of children. More than 50 million school hours are lost annually because of oral health problems that may affect children education and success in later life. This study was performed to determine the effect of health education on oral health care based on health belief model in primary boys' school of Tehran in 1385. Methods: In a cross sectional study, 125 students were selected using stratified random sampling method. Data were collected using questionnaires and observation of teeth brushing performance before and after oral health training program. Results: the results indicate that increasing in individual perception through self education and public training may be effective in improving the oral health preventive behaviors. The oral health education program based on health belief model improved correct tooth brushing practices (p<0.001). Conclusion: Health belief model may be useful in improving oral health care with emphasize on individual perceptions. Application of appropriate training aid in teaching process and provision of multi sensory experiences based on personal abilities are recommended.