Introduction: Treatment challenges, continuous need for care, constant anxiety, and the ensuing effects lead to decreased quality of life in diabetic patients. Therefore, in this study, we aimed to investigate the effectiveness of supportive group psychotherapy in the improvement of quality of life in patients with type II diabetes.

Methodology: In this quasi-experimental study with a pretest-posttest design, 24 subjects were randomly selected from the Diabetes Clinic of Tafresh, Iran. The participants were allocated to two homogenous groups, based on their pre-test scores. The subjects were randomly assigned to control and experimental groups. Supportive group psychotherapy was employed in the experimental group for 10 sessions, followed by post-test. The data collection tool included World Health Organization Quality of Life-BREF. Statistical analysis was performed, using dependent and independent t-test and analysis of variance.

Results: The analysis of variance and independent t-test results showed no significant difference between the two groups in pretest (P<0.05). However, dependent t-test results showed a significant difference between the pretest and post-test scores in the experimental group (P<0.05).

Conclusion: The results indicated that supportive group psychotherapy is effective in the enhancement of quality of life in patients with diabetes.