Hemangiopericytoma is a rare tumor of blood vessels, first described and named by Stout and Murray in 1942, arising from the contractile, elongated cells which surround capillaries originated from the pericytes of Zimmermann. It can develop anywhere there are capillaries and mostly in the connective tissue of the human body. It can also develop at any age from 12 to 90 years old, and the rate of metastasis and prognosis vary with its histologic finding, We report three cases of hemangiopericytoma - one recurred in the right forearm where a tumor was excised 15 years ago, another occurred in the left pubis which metastasized to lung and head, the other metastasized from the lung to the right scapular area - treated at the department of orthopaedic surgery, Hanyang University Hospital from 1989 to 1995.