<![CDATA[Abstract: This study aims to examine the influence of self-disclosure on self-confidence among students who use second Instagram accounts at the SMK Negeri 1 Jorlang Hataran. The research employed a quantitative method with a sample of 180 students. The sampling technique used was convenience sampling. Data collection methods involved validated and reliable self-disclosure and self confidence scales. Data analysis utilized simple linear regression, resulting in a significant regression value of P = 0.027 (< 0.05), indicating a significant influence of self-disclosure on self-confidence with a coefficient of determination (R²) of 0.027 or a contribution of 2.7%. The findings reveal that self-disclosure has a positive and significant impact on self-confidence. This means that the higher the self-disclosure level of students, the higher their self-confidence. Data categorization showed that the majority of respondents were in the moderate to high categories for both self-disclosure and self-confidence, with empirical means exceeding the hypothetical means, indicating a positive impact. Keywords: self-disclosure; self-confidence; second account; Instagram; students Abstrak: Penelitian ini bertujuan untuk mengetahui pengaruh self-disclosure terhadap self-confidence pada siswa pengguna second account Instagram di SMK Negeri 1 Jorlang Hataran. Penelitian ini menggunakan metode kuantitatif dengan jumlah sampel sebanyak 180 siswa. Teknik pengambilan sampel menggunakan convenience sampling. Metode pengumpulan data menggunakan skala self-disclosure dan self-confidence yang telah divalidasi dan reliabel. Analisis data yang digunakan adalah regresi linear sederhana dengan hasil signifikan regresi sebesar P = 0,027 (< 0,05), yang berarti terdapat pengaruh antara self-disclosure terhadap self-confidence dengan koefisien determinasi (R²) sebesar 0,027 atau sumbangsih sebesar 2,7%. Hasil penelitian menunjukkan bahwa self-disclosure memiliki pengaruh positif dan signifikan terhadap self-confidence. Artinya, semakin tinggi tingkat self-disclosure siswa, semakin tinggi pula self-confidence mereka. Kategori data menunjukkan mayoritas responden berada pada kategori sedang dan tinggi untuk self-disclosure dan self-confidence, di mana mean empiris self-disclosure dan self-confidence lebih besar dari mean hipotetik, menunjukkan pengaruh positif. Kata kunci: self-disclosure; self-confidence; second account; Instagram; siswa ]]>
