This study was devised to observe an inhibitory reaction toward an lipolytic action of toxohormone-L from KEUMSUNYEON powder. Toxohormone-L is known to be a lipolytic factor that was purified from the ascites fluid of sarcoma 180-bearing mice and of patients with hepatoma. KEUMSUNYEON powder was found to inhibit toxohormone-L induced lipolysis at its concentration of 0.5㎎/㎖.