This paper examines whether the informativeness of insider trading is associated with corporate governance. By using Institutional Shareholder Services (ISS) score as a measure of corporate governance, we find that insiders of firms with good corporate governance earn significantly lower abnormal returns from their sales transactions, especially when litigation risk is high. However, the results do not hold for their purchase transactions. Our results are robust to alternative model specifications, different sample periods, different examination windows, and alternative proxies of information content of insider trading. The results seem to be driven by the fact that better governed firms try to reduce their legal risk by effectively prohibiting insiders from exploiting negative private information, which is likely to attract more legal troubles.