Polyorchidism is a very rare congenital anomaly and about 100 cases have been documented in the literature until today. Polyorchidism or supernumenary testis is defined as the presence of more than 2 histologically proven testes. In most case, polyorchidism have characteristics of unilateral involvement and three testis and mainly finding in left-side testis. And although patient age was various, average age was about 18-year-old in previous review of article. We report a rare case of polyorchidism that an old age patient had an incidentally found right accessory testis in operating a testicular injury.