Background: Oral health problem, prevention is very important especially for Bannangsta people, because knowledge and behavior perception can improve and increase of oral health problem. Someone’s behavior is based on knowledge. Therefore, the writer is interesting to do a research about the description of oral health knowledge and perception about prevention in oral health problem at subdistrict Bannangsta people. Objective: The research aims to find out the description of oral health knowledge and perception prevention in oral health problem at subdirstrict Bannangsta people. Methodology: This study is an observational study with cross-sectional design. This research was done in Bannangsta sub-district in April 2015. Before the research was done, the research did the questionnaire validity and reliability of the questionnaire at sub-district Bannangkuwae Results: The result gained is analyzed using Pearson test resulting in significant value of 0,001 (p<0,05) which means that there is the description of oral health knowledge and perception behavior oral health problem. The correlation coefficient value is 0, 799 which means there is a medium correlation strength and positive correlation direction between the knowledge level and perception prevention. Conclusion : It can be conclude that the description of oral health knowledge and perception prevention in oral health problem at subdistrict Banangsta yala Thailand.