Poetry Oktanauli Department of Oral Biology, Faculty of Dentistry, Prof. Dr. Moestopo (Beragama) University, Jakarta

Background: Elderly (elderly) is an advanced stage of a person's life and is a natural process that cannot be avoided by every individual. Basic Health Research in 2013 states that oral and dental problems are one of the most common diseases suffered by the elderly. Poor oral hygiene in the elderly can increase the risk of oral diseases such as dental caries, periodontal disease and halitosis. Objective: This study aims to explain the level of knowledge of the elderly in South Tangerang in utilizing mouthwash to maintain oral health. Method: This type of research is descriptive, with a cross-sectional research design. The number of subjects was determined using the total sample, snowball method. Questionnaires were distributed to respondents in the form of a google form. Results: The results of this research can be seen through tables and figures based on the answers to the questionnaire given to elderly respondents. Conclusion: Knowledge level of the elderly in South Tangerang in utilizing mouthwash to maintain oral health is in the good category. This can be seen from the answers to the questionnaires that have been distributed in the form of google forms. The elderly are quite aware that the condition of bad breath (halitosis) can be overcome by using mouthwash