It is widely accepted that the number of persons who suffer from diabetes mellitus type II is constantly being increased. Despite the fact that, many research studies focus on the importance of educating not only the persons who are in high risk but also the patients with diabetes mellitus type II, in our country this issue has not been seriously taken into account. Aim The aim of the present research was to study whether education can contribute in keeping blood glucose within normal levels, aiming at the prevention of complications. Material-Methods Fiftynine diabetes patients from several public hospitals in Athens were evaluated though an open questionaire. Results The results have shown that education contributes positively to the control of blood glucose levels but serious measures have to be taken into account in the primary care of health. Conclusions Serious measures have to be taken by the authorities in order to educate the persons who are in high risk and also the patients with diabetes mellitus type II, on the importance of keeping blood sugar levels within the normal areas.