The main purpose of the project including evaluation of the effects of education based on health belief model on medication adherence in diabetic patients. This study is a randomized controlled trial, cross training trials on 130 patients referred to the diabetic clinic Arak city. Inclusion criteria including Diabetic patients 30 to 55 years; Diabetic patients without chronic complications such as retinopathy, nephropathy, neuropathy; Use of insulin; The use of anti-diabetic pills; Use of insulin and anti-diabetic pills; Exclusion criteria including if the patient is not willing to continue to cooperate; If the patient is moved from the city; the absence of ongoing diabetes education sessions; the unavailability of patients during the post-test questionnaire. The present study is done through the following steps: samples selection, pre-test using the questionnaire and determine the distribution of knowledge, severity, perceived benefits, perceived barriers, manuals, self-efficacy and performance of Compliance medication regimen before the intervention, intervention for a month, post - test through redistribution of questionnaires and interviews to determine the level of knowledge, severity, perceived benefits, perceived barriers, manuals, self-efficacy and performance in patients diabetes is 3 months after the intervention.