Diabetes is one of the biggest global health hazards of the 21st century. It is defined as a chronic disease that, with its complexity and demanding treatment, affects the entire life of not only the patient but also his family. Like any other chronic illness, diabetes should be treated and controlled from the recognition of the disease to the end of life. Our preventive interventions should be devoted to controlling physical health as well as psychological and social factors which influence of quality of life. The changes brought after the recognition of the illness require from the family a lot of energy, knowledge and ability to adapt to the new situation. The quality of patient care at diagnosis and good education and support for the patient during the first few months of treatment have a significant impact on accepting the disease and maintaining the motivation for good selfcontrol of the disease. The entire team of health care professionals is participated in health education of the patient and family. In this paper we focus on the nurse's role in information and health promotion process important for patient's future behaviour and life style. Nurse's task is diabetic patient's health care involves a number of activities such as measuring blood glucose levels, calculating carbohydrate units, adjusting insulin doses, solving specific problems, distinguishing emergencies from non-urgent ones. Continuous monitoring and timely and appropriate intervention in diabetic patients improves metabolic outcomes. A life-changing challenge for any person with cronic illness is to align their lifestyle with the preventive and therapeutic measures necessery for good control of the disease. Each developmental stage brings new challenges to strike a balance between optimal diabetes control and maintaining a good quality of life. The nurse contributes to improving the quality of life of diabetic patients and their families by providing information, counseling and support.