Advances in multimodal treatment using radiation and chemotherapy, more sophicated diagnostic, radiologic methods, and newer reconstructive surgical techniques have led to aggressive surgical treatment of chondrosarcoma of the pelvis. Recently, good results have been reported in even high grade chondrosarcoma of the pelvis with surgery with/without adjuvant therapy. From January 1984 to June 1992, ten patients with chondrosarcoma of the pelvis were treated. Their average age was 40(18 to 55). Location of the lesion were ilium(5), periacetabular lesion(1), ischiopubic region(1) and sacrum(3). Nine cases were conventional type and one was dedifferentiated type. Surgical resection was done for nine patients, with which radical margin in one, wide margin in four, marginal margin in one and intralesional margin in three. Postoperative radiotherapy(6000-7000cGy during 6-7week) was done for five patients of having wide(1), marginal(1) or intralesional(3) surgical margin. One patient took radiotherapy only after biopsy. The average follow-up period was 2 years and 9 months(1 year to 6 years 1 month). Six patients wer continuously disease free(CDF) or disease free(DF). One patient is alive with disease(AWD). Three patients died of disease(DOD). With Kaplan-Meier's method, 5-year actuarial survival rate for total 10 cases was 60%, for operated group(9 cases) 66.7% and for operated conventional group(8 cases) 80%. With wider resection margin, better survival could be achieved.