The purpose of this study was to determine the effect of profitability, leverage, and company size on disclosure of corporate social responsibility. The population used in this study are mining companies listed on the Indonesia Stock Exchange in year 2017-2019. The sampling technique used was purposive sampling technique. The data sample was obtained as many as 37 company data that met the criteria. The data analysis used is multiple regression analysis with the help of the SPSS program. The results of this study indicate that profitability has no effect on disclosure of corporate social responsibility. Meanwhile, leverage and company size have a positive and significant effect on disclosure of corporate social responsibility.