ABSTRAKLatar Belakang dan Tujuan Penelitian. Pemberian informasi merupakan salahsatu upaya preventif untuk menekan jumlah permasalahan yang berhubungandengan kesehatan reproduksi pada remaja. Studi pendahuluan pada 10 anak umur13-15 tahun, didapatkan hasil bahwa 5 anak memiliki pengetahuan kurang tentangKesehatan Reproduksi Remaja. Tujuan dari penelitian ini adalah mengetahuipengaruh penyuluhan terhadap tingkat pengetahuan kesehatan reproduksi padaremaja SMP N 16 Surakarta.Metode Penelitian. Desain penelitian eksperimen pretest-posttest control groupdesign. Metode yang digunakan adalah ceramah dengan media power point.Teknik pengambilan sampel dengan cluster random sampling. Instrumen yangdigunakan yaitu kuesioner. Jumlah sampel 166 responden, kelompok eksperimen83 responden dan kelompok kontrol 83 responden. Data yang diperoleh dianalisisdengan uji Mann Whitney U Test.Hasil Penelitian. Sebelum penyuluhan diperoleh hasil 42,2% Baik, 50,6% Cukupdan 7,2% Kurang. Setelah penyuluhan diperoleh hasil 91,6% Baik dan 8,4%Cukup. Hasil pengujian hipotesis diperoleh signifikansi 0.000.Simpulan. Terdapat pengaruh penyuluhan terhadap tingkat pengetahuankesehatan reproduksi pada remaja SMP N 16 Surakarta.Kata Kunci. Penyuluhan, Tingkat Pengetahuan, Kesehatan Reproduksi,Remaja.ABSTRACTBackground and Objective: Information dissemination is a preventive effort tominimize the number of problems related to the adolescents’ reproductive health.A preliminary research on 10 adolescents aged 13 – 15 years old shows that 5 ofthem had less knowledge of reproductive health. To investigate the effect ofextension on the reproductive health knowledge level of the adolescents of StateJunior Secondary School 16 of Surakarta.Method: This research used the experimental research method with the pretestposttestcontrol group design. The method employed lecturing one aided with thepower point media. The samples of research were taken by using the clusterrandom sampling technique. They consisted of 166 respondents. They weredivided into two, groups, namely: experimental group and control group. Eachgroup consisted of 83. The data of research were collected through questionnaireand analyzed by using the Mann Whitney U Test.Result: In term of knowledge of reproductive health, prior to the extension 42.2%of the respondents had good knowledge, 50.6% had fair knowledge, and 7.5% hadless knowledge. Following the extension, 91.6% had good knowledge, and therest 8.4% had fair knowledge as indicated by the significance value of 0.000.Conclusion: There was an effect of extension on the reproductive healthknowledge level of the adolescents of State Junior Secondary School 16 ofSurakarta.Keywords: Extension, knowledge level, reproductive health, adolescents