In this article, the authors discuss briefly the leptospirosis, emphasizing mainly the pulmonary form of disease. The authors review pathology, clinical findings, imaging and broncoscopy diagnosis, treatment of pulmonary leptospirosis. It is also remembered about early clinics and radiology diagnosis to start therapeutics. The authors conclude that pulmonary form of disease must always be remembered and considered as cause and differential diagnosis of Diffuse Alveolar Hemorrhage and Adult Respiratory Distress Syndrome.