Objective To explore the relationship among authentic leadership in head nurses, nurses′ organizational commitment and voice behavior, and to establish a model of the relationship among them. Methods A questionnaire survey was conducted among 400 clinical nurses in three 3A hospitals by convenience sampling. Results The scores of authentic leadership in head nurses, nurses′ organizational commitment and voice behavior were （3.93±0.68）, (3.32±0.43) and (3.84±0.67) points respectively. Authentic leadership and organizational commitment had a positive predictive effect on voice behavior （P＜0.01）, and organizational commitment played a mediating role between authentic leadership and voice behavior of nurses （P＜0.01）. Conclusion Hospital managers should take effective measures to improve head nurses′ authentic leadership behaviors and nurses′ organizational commitment, so as to stimulate nurses′ enthusiasm for voice behavior.