With the increase of mobbing and stress in business life, employees such as depression, loss of motivation and anxiety may occur. These negative feelings can affect the job performance of employees. In addition, the nutrition of employees can regulate their stress and performance. In this study the mediating, moderating and moderatedmediation effects of the variables of mobbing, job stress, job performance and perceived quality of meal service have been examined. The study has been carried out with 283 blue-collar employees of a private company. The research has been conducted with the primary research method, the questionnaire. As a result of the study, it has been determined that the effect of mobbing on job performance is significant that is, job stress mediates the relationship between mobbing and job performance. It has been found that the effects of job stress, perceived quality of meal service and interactional term on job performance are significant. In addition, it has been revealed that the perceived quality of meal service has a moderating effect. Finally, the indirect effect of mobbing on job performance through job stress has been found to be higher when the perceived quality of meal service is low and moderate. That is, the moderatedmediation index value is significant.