We report a case of liver metastasis from gastric cancer successfully treated with radio-frequency ablation therapy. The patient was a 63-year-old man whom we performed distal gastrectomy with D2 lymphnode dissection for type II gastric cancer on April 2004. A post operative pathological finding was pT2N1M0, Stage II. Therefore, the operation was evaluated to be as curative A. No adjuvant therapy was performed. After 11 months computed tomography showed a space occupied lesion (SOL) in S7 segment of the liver, we thought it to be as liver metastasis. We performed radio-frequency ablation therapy, and complete response was obtained. He is alive without a sign of recurrence for 30 months. We thought that radio -frequency ablation therapy was one of the useful treatments for liver metastasis from gastric cancer.