Pulmonary thromboembolism is more common in medical than in surgical wards. However, it can occur in the postoperative period especially in those undergone orthopedic surgery of the hip or knee. We had an opportunity to give witness in a law court the relation between the pulmonary infarction and general anesthesia, which case had been occurred in a local clinic. A case of pulmonary thromboembolism with infarction m a 28 year-old male is presented which developed at the near of surgery and died 1 hour after surgery of the maxillary open reduction with a plate-wire fixation. Anesthesia was performed under the general nasotracheal with Halo-O2. No case has been yet reported. Diagnosis was made by autopsy.