Factitious hemoptysis is the bleeding type of Munchausen's syndrome, and this describes a group of patients who intentionally produce symptoms. Because factitious hemoptysis is a very rare manifestation of hemoptysis, it generally passes unnoticed. We report here on a case of factitious hemoptysis in a 15-year-old boy who presented with hemoptysis. During his three hospitalizations, we conducted many diagnostic procedures, including chest CT, laryngoscopy, bronchoscopy and bronchial arteriography, yet we failed to find the definitive cause of the patient's hemoptysis. He kept on complaining of repetitive hemoptysis and seizure-like activity. His father discovered that he had collected his blood into the specimen cup via an intravenous line. After we removed the intravenous line, he did not show blood to us again. We suggest that factitious hemoptysis should be considered in the differential diagnosis of hemoptysis of an unclear bleeding focus, and especially when the patient has a bizarre hospital course or unusual behavior. We also include a review of the relevant literature.