Hemangiopericytoma of the bone is a rare malignant tumor, which usually originates in the femur and the pelvic bone of the adult. Heman-giopericytoma is often not a primary tumor but a secondary tumor associated with extraskeletal metastasis. We experienced a case of hemangiopericytoma, which originated from the retroperitoneum and had multiple metastasis to the scapula, proximal femur, cervical spine, and which converted from low grade to high grade.