This study aims to know and analyze the knowledge of adolescents to marriage along with rules in marriage based on Islam, research conducted to get a clear picture on the knowledge that adolescents have on marriage. This study uses quantitative research methods through descriptive analysis, and inferential analysis, the population in this study were students in State Senior High School at Serang Banten. From the research results can be seen that overall there are differences in adolescents knowledge between men and women, in addition to the overall adolescents knowledge has a high correlation value (very strong) to marriage this is not much different when viewed from the dimensions of adolescents knowledge that has value High correlation to marriage, the dominant factor affecting marriage based on adolescent knowledge is the dimension of experience, information, neighborhood culture, and dimension age which shows high correlation value. Thus it can be seen that the existence of knowledge in adolescents can affect adolescent attitudes toward marriage, from the results of this study can be known that the determinants of knowledge of adolescents in marriage is influenced by the factor experience, information, neighborhood culture and age.