Problems of organizational citizenship behavior among academics, especially lecturers, are something relevant in the study of the quality of an organization. The purpose of this study is to analyze the increase in organizational citizenship behavior based on Islamic work ethics, organizational satisfaction and commitment. By collecting data from 365 lecturers from 14 private universities as sample in the city of Bandung, the sampling was taken with proportional random sampling techniques. Data analysis techniques were conducted by using Structural Equation Modeling (SEM) using AMOS. The results of this study revealed the positive effect of Islamic work ethics on organizational citizenship behavior and on organizational commitment, positive but not significant effect of Islamic work ethics on job satisfaction. Islamic work ethic has a positive effect on organizational commitment. Moreover, the findings showed that job satisfaction has a positive and significant effect on organizational citizenship behavior. However, job satisfaction has a positive but not significant effect on organizational commitment. In practice, this study encourages private university management to improve work ethics and job satisfaction of lecturers, which in turn can influence organizational citizenship behavior and organizational commitment of lecturers.