Fenomena kecanduan game online semakin banyak ditemukan pada peserta didik, termasuk siswa Sekolah Menengah Kejuruan (SMK). Permasalahan ini berdampak pada motivasi belajar, prestasi akademik, serta kemampuan regulasi diri. Penelitian ini bertujuan untuk mengetahui efektivitas konseling behavior teknik self control dalam mereduksi kecanduan game online pada siswa SMK. Penelitian menggunakan desain quasi experimental dengan model one-group pretest–posttest. Subjek penelitian berjumlah 10 siswa dengan tingkat kecanduan game online tinggi berdasarkan kuisioner Game Addiction Scale (GAS). Analisis data menggunakan paired sample t-test. Hasil penelitian menunjukkan adanya perbedaan signifikan antara skor pretest dan posttest, yang mengindikasikan bahwa konseling behavior teknik self control efektif mereduksi kecanduan game online pada siswa SMK. Implikasinya, guru BK dapat mengintegrasikan teknik ini pada layanan program responsive untuk meningkatkan regulasi diri siswa terhadap penggunaan teknologi.Abstract. The phenomenon of online game addiction is increasingly being found among students, including vocational high school (SMK) students. This problem impacts learning motivation, academic achievement, and self-regulation skills. This study aims to determine the effectiveness of behavioral counseling and self-control techniques in reducing online game addiction in vocational high school students. The study used a quasi-experimental design with a one-group pretest-posttest model. The study subjects were 10 students with high levels of online game addiction based on the Game Addiction Scale (GAS). Data analysis used a paired sample t-test. The results showed a significant difference between pretest and posttest scores, indicating that behavioral counseling using self-control techniques is effective in reducing online game addiction in vocational high school students. The implication is that guidance and counseling teachers can integrate this technique into responsive program services to improve students' self-regulation of technology use.