Abstract :
Premarital sex is a phenomenon that often occurs among adolescents. Peers become one of
the causes of adolescent’s premarital sexual behavior. Peer pressure could influence
adolescent’s attitudes and behavior, in addition to being accepted in their peer groups,
teenagers have high curiosity, therefore they are easily influenced and perform these
behaviors. This study aims to determine the effect of peer pressure variables on adolescent
premarital sexual behavior. The research used quantitative non-experimental methods and
uses non-probalility sampling techniques. Research subjects were 221 teenage students who
were dating and had dated. The research instrument used NPPI (Negative Peer Pressure
Inventory) and the scale of premarital sexual behavior. The results obtained by using simple
linear regression data analysis method show a significant effect between peer pressure and
premarital sex behavior variables of 0,000 ≤ 0,05 with regression coefficient value of 0,786
and an effective contributing of 50,3%.