Background: The cleanliness of teeth and mouth is one of the factors that play a direct role in the process of dental caries. The accumulation of plaque on the surface of the tooth is the early process of caries which results in damage to the outer surface layer of the tooth as a sign of the early formation of caries. Objective: The purpose of this study is to determine the relationship of index plaque to dental caries status in the Pendul Hamlet community of Sedayu Sub- District in 2018. Methods: The type of research was observational with a cross sectional design. The study took place in December 2018 - January 2019 in Pendul Hamlet. The research subjects were 138 selected using the accidental sampling method with the criteria of age 5 years old. Dental plaque was measured using the O'Leary plaque index and dental caries status was measured using the DMF-T and def-t indices. Data analysis using Pearson correlation test. Results: The results of this study indicate that there is a significant relation between plaque index and dental caries status (p <0.05, r = 0.21). Conclusion: There is a relation between the plaque index and dental caries status in the Pendul Hamlet community, the higher of the plaque index the higher the dental caries status.