Timing and the performance are important factors in the management of dental trauma. The present study was conducted to determine knowledge and effect of demographic factors of primary school teachers in Kermanshah on the management of dental trauma. In this descriptive cross sectional study, 145 randomly selected primary school teachers were investigated. A self-administered questionnaire was used to collect the data. Data were analyzed by SPSS 17 software. Findings of this study indicated that knowledge of the primary school teachers about the management of dental trauma was insufficient and no significant relationship was observed between gender, experience, academic rank, the number of exposures to dental trauma and the teachers’ knowledge regarding the management of the avulsed or fractures teeth (P>0.05). We recommend in-service training courses and updating the teachers’ information for the management of dental trauma.