Our newly constructed index of corporate governance quality (CGQ) provides comprehensive and robust evidence for the association between CGQ and stock liquidity in the pure order-driven Australia market. By using a large sample of 1207 firms from 2001 to 2013, we find a significant positive relationship between CGQ and stock liquidity, suggesting that better governed firms have greatly improved stock liquidity. Specifically, we find that better governed firms have a lower trading cost, smaller price impacts of trade, and higher trading speed. Moreover, the empirical results reveal that CGQ improves stock liquidity because it is associated with higher information disclosure.