Granulocytic sarcoma was first described by Burns in 1811 and it is known to be an extramedullary tumor composed of immature precursor cells. It sometimes occurs with acute myeloid leukemia or myeloproliferative disorders, but there have been reports of cases occurring without such hematological disorders. A 40-year-old female with a chief complaint of neck swelling was examined in our department in 1997. CT scan showed bilateral neck lymph nodes swelling. Histological examination of open biopsy confirmed myeloblastic-type tumor cells, but peripheral blood and bone marrow examination showed no evidence of leukemia. The final diagnosis of this case was granulocytic sarcoma without hematological disorder.