Saliva is a complex oral fluid consisting of 99% water that serves as a protector of teeth and mouth against influences from outside and inside oral cavity. Saliva is influenced by several components, including salivary flow rate and pH. Salivary flow rate and pH can change due to mechanical stimulation (gargling) and chemical (taste sensation). Old coconut water contains tannin and minerals with pH of 7.3. This study aims to determine the effect of gargling of old coconut water (Cocos nucifera L) toward salivary flow rates and pH in students of SMAN 10 Fajar Harapan Banda Aceh. This research was conducted by collecting saliva by spitting method from subjects. The subject consisted of 41 students. The results of the study analysed using Wilcoxon showed that salivary flow rate had significant differences before and after gargling old coconut water with a value of p<0.05. For salivary pH, there was no significant difference before and after gargling old coconut water with a value of p>0.05. Based on the results of the study it can be concluded that gargling old coconut water has an effect on salivary flow rate and does not affect salivary pH.

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