This study aims to compare the disclosure between family-owned and state-owned firms in Indonesia Stock Exchange included in LQ45 Index in 2016. The indicator used is the Principle of Disclosure and Transparency in ASEAN Corporate Governance (ACG) Scorecard, and the method used are the qualitative descriptive and mean-comparison test. Besides, further analysis was done by classifying the findings into mandatory and voluntary disclosure. The findings show that overall, the aggregate disclosure of familyowned firms is significantly lower than state-owned firms. The interesting findings that characterize the difference are placed on Quality of Annual Report. It confirms that familyowned firms are more likely to disclose financial than governance disclosure, compared to state-owned firms. This paper motivates the government to put more emphasize on regulation since the information disclosure is crucial to stakeholders.