The article presents a clinical case of a rare disease – idiopathic pulmonary alveolitis. A 24-year-old male patient was admitted to the Republican Scientific Center for Emergency Medical Care with a referral diagnosis of "Pneumonia". Recurrent episodes of pneumonia had been occurring frequently over the past 3 years, for which the patient had repeatedly received antibacterial therapy on both outpatient and inpatient settings. He had no history of COVID-19; tuberculosis was ruled out. Upon admission to our clinic, signs of chronic hypoxia were observed (cyanosis, digital clubbing), with SpO₂ at 86% (on oxygen). Spirometry showed a vital lung capacity of 1850 mL. ECG indicated right heart strain. Chest X ray revealed a reticular enhancement of the lung pattern due to diffuse deformation of the interstitial tissue. Based on the above clinical features, the patient was diagnosed with idiopathic pulmonary alveolitis. Steroid therapy and calcium antagonists were added to the treatment regimen. As a result of this treatment, the patient's condition significantly improved, and he was discharged home in a stable condition for outpatient follow up. This clinical case illustrates the characteristics and treatment principles of this extremely rare disease.