<![CDATA[Conflict in the family often occurs due to poor communication between parents and children. Parents who are equally busy, causing the intensity and quality of communication to be very less and not infrequently also cause disputes between them. Through communication, parents should be the primary source of information and educators about free sex behavior on their teenagers. This method aims to analyze the relationship of parent communication (openness, empathy, supportive attitude, positive attitude and equality) to free sex behavior in adolescents in SMA Negeri 5 Pematangsiantar. The type of this research is an analytic survey with cross sectional approach. The population in this study is the students of SMA Negeri 5 Pematangsiantar class XI which amounted to 160 people. A sample of 20 people, taken with cluster sampling technique. Data were obtained by using questioner, analyzed by chi square test at ? = 5%. Based on the initial survey conducted, it was found that around 60% not have free sex. This situation is related to good communication between parents and children, especially communication about sex and good sex education from parents to children who have already obtained children from parents. The conclusions that parents and children are expected to maintain joint communication with free sex behavior of SMA Negeri 5 Pematangsiantar, to students of SMA Negeri 5 Pematangsiantar always improve self-control and be able to withstand a momentary desire or drive that is contrary to inappropriate behavior with social norms and to SMA Negeri 5 Pematangsiantar public still pay attention to students and direct students not to have free sex. Keywords : Parent Communication, Free Sex Behavior, Adolescent]]>
