In this study, social support, job autonomy, role conflict, and job characteristics were set as subdimensions of job demands-job resources of restaurant workers, and how they affect job engagement, job burnout, and organizational effectiveness. Useful information for management and job performance was presented. The results and implications according to the verification results are presented as follows. First, the results of analysis of the causal relationship between job demands-job resources on job engagement showed that social support and job characteristics had a significant effect on job enthusiasm. However, it was found that job autonomy and role conflict had no significant effect on job engagement. Second, the higher the job characteristics, the lower the burnout. However, social support, job autonomy, and role conflict did not have a significant effect on job burnout. Third, social support was found to have a significant effect on organizational effectiveness in the positive (+) direction and role conflict in the negative (-) direction. However, it was found that job autonomy and job characteristics had no significant effect on organizational effectiveness. Fourth, it was found that job engagement did not have a significant effect on job burnout and organizational effectiveness, and it was analyzed that as job burnout decreased, organizational effectiveness increased.