As corporate social responsibility has been increasingly important nowadays, the requirement for corporate social responsibility disclosure has been demanding too. Consequently disclosure of corporate social responsibility has become one of the most concerned issues among the academia and practice. Since cost of equity is one of the main issues in the financial decisions, this study is focusing on the impact of corporate social responsibility disclosure on the cost of equity capital. Based on the listed electronic companies in Taiwan Stock Exchange market, this research finds that corporate social responsibility disclosure has significantly negative effect on the cost of equity capital. According to this finding, we discuss the managerial implications for academia and practice. Future research suggestions are also discussed in the final section.