Authors have treated a case of glomus tumor which was occurred in the tip of the right thumb, 34 years old female. The patient has complained of pain, tenderness, and cold sensitivity on the lateral side of the tip of the right thumb for 10 years. Reddish purple discolorarion was noticed under the nail bed. On X-ray, erosion of the lateral cortex of the distal phalanx and increased soft tissue density around the erosion was noted. Grossly, the tumor was purple in color, more deeply colored than the surrounding tissue and tumor tissue will shell out of the surrounding bone and soft tissue. Glomus tumor was confirmed by the excisional biopsy.