Idiopathic pulmonary vein thrombosis, as a cause of haemoptysis, is a rare entity published in very few medical literatures. It may mimic various other clinical conditions but has a different investigation strategy and prognosis. Pulmonary vein thrombosis is difficult to diagnose clinically, requires a high degree of suspicion and a combination of conventionally used diagnostic modalities and hence very few cases have been reported worldwide. Ours is a case of a healthy adult who presented with massive haemoptysis and was diagnosed as having idiopathic pulmonary vein thrombosis with secondary pulmonary infarction. The pulmonary veins got reanalysed spontaneously within a month of presentation and his symptoms subsided.