Introduction. Type 2 diabetes is a public health problem whose management is very complex, recognizingmultiple problems and limitations for an adequate control of the disease. Objective. To determine the effect of educational program added to the usual treatment, in the control of patients with type 2 diabetes in a peruvian national hospital. Methods. A longitudinal analytical study of three months of follow-up was conducted. Fifty consecutive patients with uncontrolled type 2 diabetes who were treated in the outpatient clinical of the endocrinology service agreed to voluntarily participate in the four sessions in groups of 5-8 participants (1session/week). The availability of antidiabetic medication was assured, as well as the maintenance of the prescribed pharmacological doses from three months before the intervention and during the follow-up period. ...