Adolescence is inseparable from the physical, psychological, and social changes that are affected by the environment. Adolescent tend to have a curiosity that encourages them to do new things like looking for information about sexuality. Premarital sexual behavior in adolescents is influenced by several factors, one of which is the role of parents.The aim of this study was ti identify the relationship of the role of parents with premarital sexual behavior in adolescents in high school XY Yogyakarta. This reseach uses a cross-sectional survey. The sampling technique uses simple random sampling with 193 respondents. The instrument used in this study is a questionnaire. The correlation test used to determine the role of parents with sexual behavior is Spearman Rank Test. The result of research with Spearman Rank Test result obtained 0.000 result (p <0,005), which mean there is a significant relation between role of parent with premarital sexual behavior of adolescent at SMA XY Yogyakarta. The conclusion of the study, there is relation between role of parent with premarital sexual behavior at adolescent in SMA XY Yogyakarta