Proceedings of 3rd Asia-Pacific Business Research Conference 25 - 26 February 2013, Kuala Lumpur, Malaysia, ISBN: 978-1-922069-19-1 Impact of Firm Characteristics on CSR Disclosure: Evidence from Indonesia Stock Exhcange Istianingsih, M.S.Ak. This study aims to obtain empirical evidence about the determinants of disclosure of corporate social responsibility (CSR). Factors tested their effects on CSR disclosure in this study is Good corporate governance, profitability, financial leverage, firm size, foreign ownership, and company profiles. The samples are manufacturing companies listed on the Indonesia Stock Exchange in 2008-2010. The statistical method used to test the hypotheses is multiple regression models. Before testing the hypothesis, performed a number of descriptive testing, classical assumptions and hypotheses. The results show that firm size and profile of the company proved a significant effect on CSR disclosure. While good corporate governance, profitability, leverage, and foreign ownership did not prove significant effect of CSR disclosure. Key words: GCG, CSR disclosure, Company profile, foreign ownership. Dr.Istianingsih, M.S.Ak, Faculty of Economic, University Of Mercu Buana, Jakarta, Indonesia, Email address: istisastro@yahoo.com