The author reported 2 cases of traumatic ulcer on penis. One case showed a remarkable necrosis and infection on penis after the patient was kicked in the crotch during a fight. The other case revealed a massive necrosis of penile skin associated with purpuric change of scrotal skin after excessive exercise. Conservative treatment failed to improve the skin ulcer of both patients, therefore we carried out a debridment and mesh skin graft. Mesh skin grafts, instead of sheet skin grafts, were used. They proved to be applicable to the genital area, particularly to the penis without any post-operative functional troubles including difficulty in passing urine.