Background: Dental care starts from infancy to old age. Even before the emergence of the first tooth, the attitude on care for the oral cavity can highly affect a person’s future appearance and health. The present study was planned to assess the attitude on dental hygiene among the school children. Methods: This study was conducted with 5 to 10 years children studying at Sri Meenakshi Primary School, Annamalai Nagar, Chidambaram, using quasi experimental design. Results: In the pre-test, 49 (51.04%) of the children had unfavourable attitude and 11 (11.45%) of them had highly favourable attitude. Whereas, in the post-test, majority of 58 (60.41%) had favourable attitude and only 2 (2.8%) of them had unfavourable attitude. Conclusions: The study concluded that the structured-teaching program establishes an acceptable positive attitude towards the dental hygiene and its importance on tooth decay prevention.