This study aims to analyze the mechanism of corporate governance in compliance level of mandatory disclosure IFRS convergence and its impact on stock return. The identification process of compliance level of mandatory disclosure IFRS Convergence used item checklist issued by Bapepam LK number VIII.G.7 2012. Corporate governance mechanisms used in this research are total member of board of commissioners, percentage of attendance of board commissioners member in the meeting, and dispersion ownership. The samples in this research were banking companies listed in Indonesia Stock Exchange (ISX) year 2012-2015. The analysis tool in order to test the hypothesis was multiple regression and simple regression analysis by using SPSS 22.0. The results of this study indicates that the total number of members of the board of commissioners, percentage of attendance of board commissioners member in the meeting, and dispersion ownership has significant effect on compliance level of mandatory disclosure IFRS convergence. While the compliance level of mandatory disclosure IFRS convergence has no significant effect on Stock Return.