Giant Cell Tumor of the Tendon Sheath (GCTTS) is the most common benign neoplasm after the ganglion cyst. It is a soft tissue mass that progresses slowly and commonly occurs on the tendon sheath and at the joints of the digits. To date, most case reports have reported GCTTS in the hands. However, GCTTS originating in the hip joint has not been reported to date. Case report: We present a rare case of GCTTS in the hip joint and review the relevant literature. GCTTS of the hip joint is considerably rare. Magnetic resonance imaging is still the first choice of diagnostic modality besides pathological evaluation. Surgery is probably the optimal treatment option to prevent recurrence. In case of bony involvement, reconstructive surgery similar to artificial joint arthroplasty would be an effective treatment option.