INTRODUCTION: Autoimmune diseases are the third most common cause of morbidity and mortality in Western countries. Their development is influenced by various factors such as infection, genetic predisposition, gender, the amount of vitamin D in organism or vaccination. In addition, numerous studies have proven the benefits of a gluten-free, Mediterranean and Paleolithic diet in the onset and progression of autoimmune diseases. OBJECTIVE: The aim of this paper is to explain the importance and role of the nurse in educating patients with autoimmune diseases about proper nutrition. This paper also presents effect of proper nutrition on the development and progression of autoimmune diseases. DISCUSSION: The task of every nurse is to promote health and a healthy lifestyle, which includes the promotion of proper nutrition as one of the ways to prevent the development of disease or treat existing ones. A prerequisite for any patient education is the assessment of physiological, cognitive, emotional and motivational factors that may affect learning time and quality information acquisition. In addition, it is important to approach the patient holistically and without prejudice. When educating the patient, it is necessary to have developed communication skills such as active listening, appropriate verbal and non-verbal communication. The health educator is obliged to provide psychological support during the education and encouragement of the patient who achieves common goals, all for the purpose of improving the patient's health. CONCLUSION: The nurse has an important role in the multidisciplinary team regarding the promotion of diet therapy and achieving smaller goals that contribute to the self-confidence and motivation of patients through the treatment process. It is crucial to conduct continuous lifelong education of the community due to daily innovations in the field of proper nutrition that has an impact on autoimmune processes in the body, and which could be reduced by proper dietary patterns.