Unstable physical and psychological conditions in children aged 8-10 years are the risk of tooth and mouth disease. Saliva is very important to maintain the balance of teeth and mouth because it contains several important substances so that saliva is called a multifunctional liquid. The ability of saliva to prevent the formation of dental and oral diseases depends on the amount of salivary secretion or the salivary flow. some stimulants such as mechanics and chemistry can affect the amount of salivary flow rate. Pineapple fruit is a fruit that contains high fiber and citric acid. The purpose of this study was to determine the difference in salivary flow rates before and after chewing pineapple (Ananas comosus) in children aged 8-10 years. The study was quasi experimental. The number of children who have inclusion and exclusion criteria is 76 children. Each child was taken the salivary flow rate when he stayed for 2 minutes (pretest) and compared with the amount of salivary flow rate after chewing pineapple for 2 minutes (posttest).The results of this study were tested by Wilcoxon analysis, with a calculated Z value in the Wilcoxon test of 7.577> Z table (1.960) and a significance value of 0.000 <0.05. Based on these results it is known that the hypothesis in this study was accepted that is there are differences in salivary flow rates before and after chewing pineapple (Ananas comosus) in children aged 8-10 years.