本研究探討投資人情緒與盈餘管理之間的關係,以台灣上市(櫃)公司為研究對象,樣本期間為2001年至2010年。過去的研究多探討投資人情緒會影響公司不同的財務和投資活動,較少探討投資人情緒變數是否會影響盈餘管理。有別於過去學者研究,本研究主要探討投資人情緒與盈餘管理的關係,並以不同的應計項目去衡量對盈餘管理的方法下,去衡量公司盈餘管理之行為。實證結果顯示,在不同的應計項目去衡量對盈餘管理的方法下,當投資人情緒愈高,總應計項目愈高,盈餘管理愈高,即公司愈會去進行盈餘管理之行為,當投資人情緒愈低,總應計項目愈低,盈餘管理愈低,即公司愈不會去進行盈餘管理之行為;當投資人情緒愈高,裁量性應計項目愈高,盈餘管理愈高,即公司愈會去進行盈餘管理之行為,當投資人情緒愈低,裁量性應計項目愈低,盈餘管理愈低,即公司愈不會去進行盈餘管理之行為。本研究進一步測試分析,盈餘管理的方向不同是否與投資人情緒有關,實證結果顯示,投資人情緒愈高,裁量性應計項目正值越大,愈會利用正總應計項目來操縱盈餘,即公司將盈餘向上來操縱;投資人情緒愈高,裁量性應計項目負值越小,即公司將盈餘向上操縱;綜上所述,投資人情緒會影響公司進行盈餘管理的行為,且亦會影響公司盈餘管理的方向。This study investigates the relation between investor sentiment and earnings management. While prior research suggests that investor sentiment influences various corporate financing and investment activities, limited empirical evidence exists on the influence of investor sentiment on earnings management. We extend this research by examining the relation between investor sentiment and earnings management, and also estimated earnings management in two different accruals ways. From the empirical study, we find that managers’ propensity to manage earnings increases with the level of investor sentiment. During high-sentiment periods, total accruals are greater, manager tend to manage earnings. And during high-sentiment periods, discretionary accruals are greater, manager tend to manage earnings. Additional analyses indicate that the association between investor sentiment and the direction of earnings. We find that, during high-sentiment periods, the positive of discretionary accruals are greater, manager tend to more income-increasing accruals.