This study was aimed at investigating the relationship between organizational commitment, interpersonal communication and reward with employee quality of service. A survey was conducted at the Manado University with a sample of 60 selected randomly. The research concludes that there be positive correlation between: (1) the organizational commitment and the employee quality of service, (2) the interpersonal communication and the employee quality of service, (3) the reward and the employee quality of service, (4) moreover there is a positive correlation between the organizational commitment, interpersonal communication, and reward system woth employye quality of service. Therefore, based on the result of the study, the employee quality of service can be improved through the organizational commitment, interpersonal communication, and reward.