Aim and Background: Diabetes is a factor of many physical and psychological disorders. Nowadays, the concept of adherence in diseases be attention and has been developed due to changing the illness pattern from acute to chronic, changing its ideology from cure to prevention, limited economical resource and shortening the Duration of hospitalization of patients. In order to, the aim of this study was to survey of effectiveness of acceptance and commitment therapy on health related beliefs among patients with type 2 diabetes.

Methods and Materials: research method was semi experimental with pretest, posttest and control group design. From patients with type 2 diabetes who referred to Assaluyeh health centers, 30 subjects were selected purposely and were assigned in control and experimental groups randomly (15 subjects each group). To collect the data the Health Beliefs Questionnaire (HBQ) was used. The data analyzed using MANCOVA.

Findings: Results of data analyzing showed that acceptance and commitment therapy on health related beliefs of patients with diabetes type 2 is effective (p<.05).

Conclusions: Results of the research showed that acceptance and commitment therapy is effective on health related beliefs. Theoretical and practical considerations of the results showed that the ACT as an effective therapy for patients with type 2 diabetes in medical centers could be applied.