Primary malignant lesion of gut is a rare tumor, only few cases have been reported in the litreature for which different criteria have been mentioned by different authors. We report a case of 70 years old female admitted with complaints of pain and abdominal distention presenting as intestinal obstruction. She was operated in emergency and found to have intussusception hence segmental intestinal resection was performed. Gross, microscopic, histochemical, Immunohistochemical finding confirmed the diagnosis of malignant melanoma. No other primary site was found on clinical examination. On follow up secondaries were found after 10months in the liver and retroperitonium, which was confirmed by FNA.