This study explores the impact of CEO overconfidence and board expertise on analyst forecasts in Taiwan listed companies from 2006 to 2017. This study uses two indicators to measure analyst forecast: analyst forecast error and analyst forecast dispersion. The empirical results found that the companies with overconfident CEO are more willing to expose information to the market to reduce analyst forecast errors and dispersion. When the company has a high professional board structure, the company with overconfident CEO will increase analyst forecast error and dispersion. This research has contributed to the literature regarding the board expertise.