Introduction: The Indonesian people that have dental and oral health issues are increased from 23% in 2007 to 25,9 % in 2013 according to the RISKESDAS data. One of the reasons for someone having dental and oral health issues is their lack of teeth and oral education. This research aims to analyse the effectiveness of education through social media (Whatsapp) on kindergarten students’ parent’s knowledge about dental and oral health. Method: The method that used in this research is giving education about dental and oral health through social media whatsapp to the parents of Tanassa Al-Arafah Kindergarten student. Parent’s knowledge of dental and oral health is measured with questionnaire. There are 44 respondents from the parents of TK Tanassa Al-Arafah students. Results: The results of the questionnaires were analyzed using Wilcoxon Matched Pairs non-parametric test to see the significant difference between pre-test and post-test scores. The Statistic Test results shows that there is an increase in parents dental and oral health knowledge level after being given the education, There is 97,7% (43 respondents) from the sample that have the good category for the value post-test and the remaining 2.3% (1 respondents) is having enough category for the value post-test. Conclusion: From the result, it can be concluded that there has been an increasing of the dental and oral knowledge that can be looked from the rise in the questionnaire pre-test and post-test average scores, before and after the parents were given the dental and oral education. The advice of this study is to do a further research about the other factors that affect the level of knowledge, such as the environment, social and economic factor from the parents.