Background and aims: Caring for patients with multiple sclerosis causes family caregivers many problems and challenges. Self-management interventions can facilitate the caring process and increase the quality of patient care. Therefore, the aim of this study was to investigate the effect of a self-management program on Self-concept of the family caregivers of multiple sclerosis patients. Methods: This quasi-experimental study was conducted in 2018 at the MS Treatment Center of Shahrekord. The samples were selected through convenience sampling method. First, participants were assigned to two groups of men and women by stratified random sampling, and then men and women were assigned randomly to intervention (n=35) and control (n=35) groups. For the intervention group, the selfmanagement program was implemented twice a week in 8 sessions. Data collection was performed using the Coopersmith self-concept Inventory in two groups before, immediately after, and three months after the intervention. Data were analyzed by SPSS version 16.0. Results: The mean scores of self-concept in the intervention and control groups before the intervention were 72.6±9.1 and 72±10.6, respectively. There was no significant difference between the mean score of self-concept between the intervention and control groups before the intervention (P>0.05). The mean scores of self-concept immediately after the intervention in the two groups were 86.4±9.2 and 73±10.6, and three months after the intervention, they were 103±7.4 and 73.9±10.5, respectively. A significant increase in the scores of self-concept in the intervention group (P<0.001) was observed. Moreover, the independent t test showed a significant difference in the two groups immediately after and three months after the intervention (P<0.001). Conclusion: Self-management program increased the self-concept of multiple sclerosis (MS) patients’ caregivers. Therefore, selfmanagement can play a critical role in improving the quality of life of family caregivers and coping with the physical and psychological stress related to their caring role.