Introduction: A gastric ulcer is a narrow sore in the mucous membrane of the stomach or duodenum caused by the corrosive gastric acid and digestive juices.The causes of gastric ulcer formation are among the most important among people with Helicobacter pylori infection, patients treated with anticoagulant and non-steroidal anti-inflammatory drugs, patients with multiple associated diseases.It is therefore important how these patients are involved in the process of nursing care. Purpose: The purpose of the diploma thesis is to present, based on a literature overview, the nursing care of the patient with gastric ulcer and the role of the nurse. Methods: A descriptive method was used. An overview of scientific literature in Slovenian and English pertaining to the nursing care of the patient with gastric ulcer and to the role of the nurse was carried out. The analysis included the literature ranging from 2007 to 2018. 1.658 articles were obtained altogether and ten of them were used for the analysis. Results: The nurse is a person who is at the hospital most of the time with the patient. She/he monitors the patient’s health status and is responsible for carrying out the nursing care. The nurse plays an important role in identifying and eliminating nursing problems. In the patient with gastric ulcer, she/he focuses on such nursing problems as the patient’s insufficient knowledge and stress prevention, all the while offering psychological and professional support. It is thus important that she/he transfers information and knowledge in a comprehensible form, which helps the patient overcome fears and doubts. The nurse teaches and encourages the patient to recognize and be able to prevent the stress accordingly. Health education is planned and carried out on an individual basis through video teaching programs and various written materials. Discussion and conclusion: By raising awareness and transferring knowledge, the nurse helps upgrade the patient’s previously limited knowledge. In the process of health education, she/he familiarizes the patient with the disease, different diagnostic procedures, modes of treatment, and encourages him/her to change his/her lifestyle. Through lifestyle changes the patient can do a lot for his/her health: the possibility of relapse is reduced, the time of treatment is decreased, and the possibility of other complications of the disease is reduced as well. For the successful and efficient implementation of nursing care and health education, the nurse must strive for improvement and receive training constantly; only this way can she/he obtain new knowledge and skills.