Munchausen's syndrome is a psychiatric disorder in which patients inflict on themselves an illness or injury for the primary purpose of assuming the sick role. These patients can present with many different complaints and clinical symptoms including self-inflicted bleeding. This report describes a case of lately diagnosed Munchausen's syndrome who presented with hemoptysis and developed hematochezia and hematuria during the hospitalization period. Physicians should always consider this rare disorder in cases presented with bleeding symptoms of unknown origin.