ABSTRAKLatar Belakang. Sikap menerima atau menolak pergaulan bebas pada remajasalah satunya dipengaruhi oleh komunikasi antara orangtua dengan remaja.Komunikasi yang efektif dilakukan antara orangtua dengan remaja terhadap topiktopikseksualitas memiliki peran penting dalam mempengaruhi sikap remajaterhadap pergaulan bebas. Tujuan penelitian untuk mengetahui hubungan antarakomunikasi efektif tentang seksualitas dalam keluarga dengan sikap remajaterhadap pergaulan bebas.Metode. Jenis penelitian observasional analitik dengan pendekatan crosssectional. Sampel 152 responden. Teknik pengambilan sampel proportionaterandom sampling. Instrumen penelitian menggunakan kuesioner. Uji statistikyaitu uji hubungan dengan Kendall Tau.Hasil. Responden yang memiliki tingkat komunikasi efektif dalam keluarga tinggi25 orang (16,4%), sedang 105 orang (69,1%), dan rendah 22 orang (14,5%).Responden yang memiliki sikap positif terhadap pergaulan bebas 66 orang(43,4%) dan sikap negatif 86 orang (56,6%). Hasil analisis Kendall Tau diperolehnilai p value sebesar 0,000 (p<0.05).Simpulan. Terdapat hubungan antara komunikasi efektif tentang seksualitasdalam keluarga dengan sikap remaja terhadap pergaulan bebas.Kata Kunci: Komunikasi Efektif, Remaja. Pergaulan BebasABSTRACTBackground: The attitude to receiver or reject free sex by adolescents isinfluenced by many aspects, and one of which is the communication levelbetween the parents and their adolescent children. An effective communicationdone by the parents and the adolescents on the sexual tipics has an important ininfluencing the adolescents’ attitude of free sex. Objective to investigate thecorrelation between the effective communication on sexuality in family and theadolescents’ attitude of free sex.Method: this research used the observational analytical method with the crosssectional design. The samples of research consisted of 152 respondents and weretaken by using the proportionate random sampling. The data of research werecollected through questionnaire, and statistically analyzed by using the KendallTau’s formula.Result: 25 respondents (16,5%), had a high level of effective communication, 105respondents (69,1%) had a medium level of effective communication, and 22respondents (14,5%) had a low level of effective communication. In addition, 66respondents (43,4%) had a positive attitude of the free sex, whereas the rest 66(56,6%) had a negative attitude of the free sex. The result of analysis with theKendall Tau’s formula shows that the p-value was 0,000 (p<0,05).Conclusion: there was correlation between the effective communication onsexuality in family and the adolescents’ attitude of free sex.Keywords: Effective Communication, Adolescents, free Sex