Abstract. This study examines the effect of Good Corporate Governance mechanisms on the profitability of banking companies listed on the Indonesia Stock Exchange during 2022-2024. The governance mechanism is measured using a composite index comprising the size of the board of commissioners, the board of directors, and the audit committee, while profitability is measured using Return on Assets. The study applies a quantitative verification method using secondary data obtained from annual reports and financial statements. Saturated sampling produces 47 banking companies and 141 firm-year observations. The governance indicators are normalized using the min-max method and aggregated through equal weighting. Panel data regression is estimated using the Random Effect Model. The results show a positive regression coefficient of 0.021432, but its probability value of 0.1449 exceeds the 5% significance level. Therefore, the Good Corporate Governance mechanism does not significantly affect profitability. The R-squared value of 1.5333% indicates that banking profitability is predominantly determined by factors outside the governance mechanism examined in this study. Abstrak. Penelitian ini bertujuan menganalisis pengaruh mekanisme Good Corporate Governance terhadap tingkat profitabilitas perusahaan sektor perbankan yang terdaftar di Bursa Efek Indonesia periode 2022-2024. Mekanisme tata kelola diukur menggunakan indeks komposit yang terdiri atas ukuran dewan komisaris, dewan direksi, dan komite audit, sedangkan profitabilitas diukur menggunakan Return on Assets. Penelitian menggunakan metode verifikatif dengan pendekatan kuantitatif serta data sekunder yang berasal dari laporan tahunan dan laporan keuangan perusahaan. Teknik sampling jenuh menghasilkan 47 perusahaan dan 141 observasi perusahaan-tahun. Indikator tata kelola dinormalisasi menggunakan metode min-max dan diagregasikan melalui pembobotan yang sama. Analisis regresi data panel menggunakan Random Effect Model. Hasil penelitian menunjukkan koefisien regresi positif sebesar 0,021432, tetapi nilai probabilitas sebesar 0,1449 lebih tinggi daripada tingkat signifikansi 5%. Dengan demikian, mekanisme Good Corporate Governance tidak berpengaruh signifikan terhadap profitabilitas. Nilai R-squared sebesar 1,5333% memperlihatkan bahwa profitabilitas perbankan lebih dominan dipengaruhi faktor lain di luar mekanisme tata kelola yang diteliti.