There is importance in revealing the factors that affect happiness at the workplace, which provides important benefits both to employees and organizations. The current study aimed at determining the effects that ethical leadership and employee voice have on happiness at the workplace. In addition, it was also aimed at revealing the mediating role of employee voice in the effect of ethical leadership on happiness at the workplace. The study was performed in İstanbul between November 1st, 2022, and October 6th, 2023, and the data were obtained from employees working at private hospitals in this province. In the study, the data were obtained from 302 employees. According to results of the study, ethical leadership positively affects employee voice. Ethical leadership and employee voice positively affect happiness at the workplace. In addition, employee voice has a mediating role in the effect of ethical leadership on happiness at the workplace. The study conclusions show that happiness at the workplace is affected by ethical leadership and employee voice. According to these conclusions, some suggestions were made to increase the perception of ethical leadership, employee voice and happiness at the workplace.