Purpose: The purpose of this study was to identify effects of moving from a functional method of nursing care delivery to a modified team nursing delivery system. Methods: A structured self-report questionnaire was used to measure satisfaction with the nursing delivery system, self-efficacy, job stress and nursing performance. Participants were 72 nurses working at a university hospital and data were collected three times; before, one month and three months after the modification to a modified team nursing delivery system. Data were analyzed using repeated measure ANOVA. Results: Satisfaction with the nursing delivery system increased significantly after the change to the modified team nursing method. There were no significant differences in self-efficacy, job stress, or nursing performance. However, satisfaction with the nursing delivery system and nursing performance increased and job stress decreased significantly in new nurses with less than 1 year experience. Conclusion: Results indicate that a modified team nursing method has positive results on nurses' satisfaction, self-efficacy, job stress, and nursing performance compared to the functional method. Effect of changing the nursing delivery system in the hospital suggests possibilities and directions for a modified nursing delivery system that would be useful in hospitals presently using the functional method.