Background and Objective: Families of persons with disabilities who do not have adequate social support do not have proper mental health, and this puts the health of the community at risk. This study aimed to investigate the effectiveness of an educational intervention based on self-efficacy and social support on the mental health of families of persons with disabilities.

Materials and Methods: This semi-experimental study was conducted on 100 families with a child with a disability, with random sampling, in 2022 in Zabol city. The data collection tool, with appropriate validity and reliability, included demographic information, awareness, attitude, self-efficacy, mental health, social support, and a questionnaire on the experiences of received services. The educational intervention was conducted for four weeks and eight educational sessions in the form of question and answer, pamphlet presentation, educational video display, and group discussion. WhatsApp groups were also created to send educational messages. After one month, the post-test was performed. The obtained data were analysed using SPSS23 software and chi-square, t, and logistic regression tests.

Results: There was a statistically significant difference between the mean change scores of awareness, attitude, self-efficacy, mental health, and social support score in the intervention and control groups after the educational intervention (p<0.001). The results of the regression test showed that only the social support structure had a significant effect on the mental health of families of persons with disabilities (P<0.05).

Conclusions: The educational program based on self-efficacy and social support was effective on the mental health of families with a member with a disability. Therefore, it is recommended to implement educational interventions with an emphasis on social support to promote the mental health of families with a member with a disability.

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