This research studies the effect of information asymmetry on the cash dividend policies of companies. Researches have studied the possible implicit information hidden in the payout of cash dividends, based on the dividend signaling theory while there is information asymmetry. However, very few had studied the relationship between information asymmetry and cash dividend policy. Listed companies in Taiwan stock exchange are analyzed in this paper. Evidences show a significant negative correlation between information asymmetry and cash dividend policy. In other words, the results in the Taiwan stock market do not support the dividend signaling theory.