This study analyzes the moderating effect of different kinds of family ownership on the relationship between market liquidity and capital structure. Using a new sample of 315 Vietnam listed firms for five years, we figured out a significant negative link between stock market liquidity and capital structure. However, it is well noted that there is an adverse reaction from family ownership where the higher the dual-class control and dynamic structure mechanism, the more control-enhancement the family ownership will be, which leads to a higher risk aversion regarding debt-bankruptcy. In this sense, corporate leverage had responded positively to an increase in stock liquidity in the case of family ownership intervention.