A 42-year-old man referred to our hospital with the chief complaint of a solid mass of right scrotal contents. As ultrasonography revealed a right testicular tumor, right high orchiectomy was performed and the pathlogical diagnosis was testicular seminoma. At the age of 35-year-old, he was admitted to another hospital for male infertility due to azoospermia. Because left testicular tumor was found, left high orchiectomy was performed, with right testicular biopsy and testicular sperm extraction of the right testis at the same time. Pathological diagnosis revealed left testicular seminoma and no malignancy of the right testicular biopsy specimen. After the second operation, he has been receiving androgen replacement therapy, with no evidence of tumor recurrence.