The number of family firms has increased since the Chinese economic reform began in 1987. In particular, the proportion of family firms in capital market have been increasing recently. Whether earnings quality of family firms is good is important to investors. Therefore, it is important to investigate the factors which affect earning quality of the family firms in China. This study aims to examine whether the earnings quality is different between family firms and non-family firms. This study also examines whether earnings quality of family firms is affected by family firm founders serving as Chairman of the board and the succession. In this study, the sample is selected from firms listed in Shanghai Stock Market and Shenzhen Stock Market from 2010 to 2015. The empirical results indicate that there is no significant differences in earnings quality between family and non-family firms. The empirical results also indicate that family firm founders serving as chairman and succession has no significant impact on earnings quality of family firms.