Fibrous pseudotumor is not uncommon in other sites of the body, but rarely occurs on the testicular tunica albuginea. The real etiology of fibrous pseudotumor remains uncertain till. We reported a case with a gradually progressed painless left testicular mass for more than six months without history of inflammation, infection, trauma or previous sugery over scrotal region. Left simple orchiectomy was performed after scrotal magnetic resonance imaging (MRI) which revealed an extratesticular multinodular tumor mass. The pathological diagnosis was fibrous pseudotumor of testicular tunica albuginea. (J Urol R.O.C., 9:166-170,1988)