Epidermoid cyst is a rare benign tumor of the testis, it is estimated to represent 1~2% of all testicular tumors. Most of the lesions were detected in the second to the fourth decades of life and were often found by self-examination or during a routine physical check-up. Herein, we report a testicular epidermoid cyst which was incidentally found in cryptorchid testis after orchiectomy. (J Urol R.O.C., 9:159-161,1998)