This study aimed to verify the influence of corporate governance mechanisms to the environmental disclosure at plantation companies listed in Indonesia Stock Exchange and Malaysia Stock Exchange period 2013-2015. The variable examined in this research consisted size of board of commissioner, the proportion of independent board, the educational background of commissioner president and the number of board meetings. This study using purposive sampling method, obtained 30 plantation companies in Indonesia and 75 plantation companies in Malaysia. Tests performed include: descriptive statistics, classical assumptions, coefficient of determination, F test, regression, t test, and chow test. Results of the study: 1) size of board of commissioner positively affect onto the environmental disclosure disclosure in Indonesia, while in Malaysia has no effect, 2) the proportion of independent board negatively affect to the environmental disclosure in Indonesia, while in Malaysia has no effect, 3) the educational background of commissioner president and the number of board meetings are not affects to the environmental disclosure in Indonesia and Malaysia, 4) there are differences the environmental disclosure in Indonesia and Malaysia, 5) there are differences effect of corporate governance mechanisms to the environmental disclosure in Indonesia and Malaysia.