In this case report was presented a cattle 3 years old Holstein breed with the large a skin neoplasm: 7 kg mass, 32x30x12 cm diameters, we 11-circumscribed, atopecic, black, black pigment on the traumatic surface, deep excoriation and ulceration, on the middle ventral abdomen area; between umbilical and udder. Melanoma was diagnosed clinically. Neoplasma removed by wide surgical excision and confirmed by histopatological examination.