This study was aimed to examine the influence of corporate governance on firm value, corporate governance on earnings management, earnings management on firm value, and whether earnings management as a mediating variable between corporate governance and firm value. Corporate governance consisted of institutional ownership, managerial ownership, the board of commissioner frequency meeting, and audit committee frequency meeting. The populations of this study were all manufacturing companies listed on the Indonesia Stock Exchange during the years 2015-2017. The data used in this study were the secondary data and followed by the use of purposive sampling method. There were 33 samples with 99 observations which fulfilled the criteria to be the research sample. Data analysis was done by the partial least square approach with SmartPLS software. This study showed that institutional ownership and managerial ownership had a negative influence on earnings management. Board of commissioner frequency meeting and audit committee frequency meeting had no influence on earnings management. Institutional ownership, managerial ownership, the board of commissioner frequency meeting, and audit committee frequency meeting had a positive influence on firm value. Earning management had no influence on firm value and also found that earnings management was not a mediating variable between corporate governance and firm value.