Abstract: Aqueous and ethanolic extracts of ten plants used in traditional Indian medicine for treatment of an infectious nature were screened for antibacterial activity by disc diffusion method against Streptococcus mutans. Among them the ethanol extracts of Allium sativum bulb exhibited high degree of inhibition followed by Azadirachta indica leaf extracts. The aqueous extracts of plants did not show any antibacterial activity against Streptococcus mutans.