Gingival recession is a common dental problem that can cause discomfort and even tooth loss if left untreated. One of the factors that contribute to this condition is improper tooth brushing techniques. In Banda Aceh City, there is limited research on the relationship between tooth brushing methods and gingival recession among students. This study aims to determine the relationship between vertical-horizontal tooth brushing methods and gingival recession in grade XI science students at SMA Negeri 9 Banda Aceh. The research design used was an analytical cross-sectional study with a population of 113 students and a sample of 57 students selected randomly. Data collection was carried out by observing the tooth brushing method, filling out the checklist sheet, and conducting a direct examination to detect gingival recession. Statistical analysis used the Chi-square test with a significance level of p<0.05. The results showed a significant relationship between vertical-horizontal tooth brushing methods and gingival recession in grade XI science students at SMA Negeri 9 Banda Aceh (p=0.004). This indicates that incorrect tooth brushing techniques can lead to gingival recession in students. The conclusion of this study emphasizes the importance of proper tooth brushing methods in maintaining dental and gingival health. Students need to be taught the correct tooth brushing technique and are recommended to brush their teeth at least twice a day with the correct method.