Pneumonia is an acute respiratory disease that affects all age groups. The causative agents are microorganisms: bacteria, viruses, fungi, parasites. The most common occurrence of pneumonia is in the winter, and it most often affects the elderly, patients with chronic diseases such as chronic obstructive pulmonary disease (COPD), immunocompromised and hospitalized patients, immobile patients, especially those treated in intensive care units. The most common symptoms of pneumonia are fever, shortness of breath, cough, chest pain, shivering and chills. The diagnosis is made on the basis of anamnesis, biological materials taken for microbiological analysis, physical examination, laboratory findings, and the gold standard is an X-ray of the lungs. Treatment is carried out using antimicrobial therapy that depends on the cause of the disease and the use of symptomatic therapy. Pneumonias can be divided into nosocomial and general population pneumonias, primary and secondary, atypical, bacterial and pneumonias in immunocompromised patients. The nurse has a significant role in the prevention, treatment, rehabilitation and education of patients. The approach to the patient should be holistic, it is necessary to consider all the mental, physical, social and cognitive characteristics of the patient and apply professional communication in communication. She also participates in the establishment of nursing diagnoses and interventions in order to improve the quality of health care and provides psychological support to the patient and encourages him to be independent. In education, it is important to suggest proper nutrition, a healthy lifestyle, encourage healthy living habits and patient independence, and include the family in the educational program. The work of a nurse requires a conscientious and professional approach aimed at preventing the spread of nosocomial infections.