A 76-year-old male was scheduled for colonectomy on the 36th day after percutaneous transluminal coronary angioplasty for right coronary artery disease. A pulmonary artery catheter was placed for hemodynamic monitoring preoperatively. After the patient came back to the ward, massive hemoptysis was noted. Emergency bronchoscopy and chest X-ray suggested pulmonary artery perforation caused by a pulmonary artery catheter. In the ICU, the patient was treated with blood transfusion and mechanical ventilation with PEEP under heavy sedation. After 9-day controlled ventilation, the patient was extubated without any subsequent events. Systemic atherosclerosis and prolonged coagulation time may contribute to this event. The indication of perioperative pulmonary artery catheterization should be cautious on consideration of risk-benefit balance.