Clear cell sarcoma is a rare soft tissue sarcoma that occurs in tendons and aponeuroses, usually in the lower extremities in young adults. The exact histogenesis is not definitely established. We experienced a case of 58 year-old female who presented with a $3.2{ imes}2.2cm$ sized mass located in the subcutaneous tissue of the left lower thigh. The mass was well-circumscribed, grayish and firm. Two small satellite nodules were also seen. Histrionically, the tumor was composed of round to fusiform cells with clear or pale eosinophilic cytoplasm and separated into compact nests or short fascicles by delicate fibrous septa. The melanin pigments and hemosiderin were seen. Tumor cells showed positive reaction for S-100 protein and HMB-45. The ultrastructural examination showed abundant mitochondria and melanosomes.