Angiosarcomas are extremely rare in the nasal cavity and para-nasal sinus. Upto the present only nineteen cases have been reported in the literature. A 31-year-old male presented with right facial swelling and large oral cavity mass. He was treated with wide excision of the tumor by radical maxillectomy. The tumor was diagnosed as angiosarcoma by immunohistochemical staining with factor VIII-reactive antigen. No adjuvant radiotherapy after surgery was done. After 9 montbs from surgery, the tumor recurred in the primary sites of oral cavity and right maxillary sinus and metastasized to the both lungs. He was treated with palliative chemotherapy and showed a stable disease in follow-up magnetic resonance image of para-nasal sinus and simple chest X-ray after second cycle of chemotherapy. He is undergoing further chemotherapy without any problems. We report first in Korea a case of primary angiosarcoma of the right maxillary sinus in a 31-year-old male.