We report a patient with malignant melanoma(stage IV)who died 27 days after surgery. A 76 year-old Japanese man visited our clinic complaining of a 40×40×11mm nodule on the left lower leg. Malignant melanoma was diagnosed histologically, and multiple metastases to the liver were revealed by CT scanning. At this time, we had to decide whether or not surgery was indicated for the skin tumor. The merits of surgery included eradication of the tumor and removal of the offensive odor of the tumor and bleeding. The demerits were worsering of the patient's general condition and the risk of general anesthesia. We finally decided to carry out surgery in order to allow the patient to be discharged from the hospital. The patient was happy that the tumor had been resected and the defect repaired by a skingraft. Although laboratory data remained stable, the patient suddenly died of acute heart failure 27 days after the operation. This case illustrates the difficulty in deciding whether surgery is indicated for aged patients with skin tumors.