Polyorchidism is a rare congenital malformation of the urogenital system,in which a man has three or more testes,and the excess testes are usually located in the scrotum.A case of polyorchidism was reported in this paper.The patient presented with a scrotal mass,and ultrasonography showed an echogenic mass resembling testicular tissue in the right scrotum.A palpable mass in the right lower pole of the testis was found during the operation and completely removed.Pathological examination showed that the nodule parenchyma was seminiferous tubules under the microscope,and the nodule was covered with a white structure,which was considered as polytorchidism.Six months after the operation,the bilateral testis and epididymis were normal.