Abstract: This study investigates the effectiveness of solution-focused brief counseling and motivational interviewing in enhancing students’ self-disclosure. This study used a randomized pretest-posttest control group design. The sixteen participants from State Junior High School 3 Comal, Indonesia, were selected through nonprobability sampling with purposive sampling. The participants were divided into experiment and control groups. For the research instruments, this study used The Self-Disclosure Questionnaire developed by Jourard to measure students’ self-disclosure. The obtained data were analyzed using the repeated measures ANOVA test. Our analysis results showed that solution-focused brief counseling and motivational interviewing were effective in improving students’ self-disclosure. Therefore, the school counselor can implement both solution-focused brief counseling and motivational interviewing to enhance their students’ internal potential and self-disclosure. Future studies are suggested to widen the research participants and analyze the effects of gender and age differences on the effectiveness of solution-focused brief counseling and motivational interviewing in improving students’ self-disclosure. Abstrak: Penelitian ini bertujuan untuk mengetahui keefektifan solution-focused brief counseling dan motivational interviewing untuk meningkatkan self-disclosure peserta didik. Penelitian ini menggunakan desain randomized pretest posttest control group design. Teknik pengambilan sampel menggunakan nonprobability sampling dengan sampling purposive. Sampel yang dilibatkan sebanyak enam belas peserta didik di Sekolah Menengah Pertama Negeri 3 Comal, Indonesia yang dibagi sama rata pada kelompok eksperimen dan kelompok kontrol. Instrumen yang digunakan untuk mengukur self-disclosure adalah The Self-Disclosure Questionnaire yang dikembangkan oleh Jourard. Metode analisis data menggunakan uji repeated measures ANOVA. Hasil menunjukkan bahwa solution-focused brief counseling dan motivational interviewing efektif untuk meningkatkan self-disclosure peserta didik. Berdasarkan penelitian, konselor sekolah dapat mengaplikasikan solution-focused brief counseling dan motivational interviewing untuk meningkatkan potensi internal dan self-disclosure peserta didik. Peneliti selanjutnya dapat memperluas cakupan subjek penelitian, menganalisis perbedaan gender dan usia antar subjek penelitian dalam keefektifan pendekatan solution-focused brief counseling dan motivational interviewing untuk meningkatkan self-disclosure peserta didik.