This study aims to verify the influence of managerial ownership, institutional ownership, and growth opportunity on the accounting conservatism of manufacture company in Indonesia Stock Exchange and Malaysia Stock Exchange in 2015-2016. The sampling technique used was purposive sampling method and obtained total sample 102 Indonesian manufacture companies and 130 Malaysian manufacture companies. Test performed include: descriptive statistics, classical assumption, regression, F test, t-test, coefficient of determination and independent sample t-test. Based on the analysis that has been made the research result are: 1) managerial ownership has no effect on the accounting conservatism in Indonesia and Malaysia, 2) institutional ownership has no signifikan positive effect on the accounting conservatism in Indonesia and Malaysia, 3) growth opportunity has no significant positive effect on the accounting conservatism in Indonesia and Malaysia, 4) there are differences accounting conservatism between Indonesia and Malaysia