Gunshot wound injury to the external genitalia is relatively uncommon. However, if a testis is affected in such a case, early surgical exploration should be carried out. A 16-year-old boy presented with right testicular rupture. Tunica albugineal defect could not be closed primarily. We used Tutoplast (R) processed bovine pericardium to repair the defect of tunica albuginea. At his 3-month follow-up visit, there was no complication. Doppler blood flow of testis was normal. In this case, preservation of testis tissue was obtained with early exploration and repair of the big tunica albugineal defect with Tutoplast (R) processed pericardium.