Malignant hyperthermia is a potentially fatal hypermetabolic syndrome characterized by hyperpyrexia and skeletal muscle rigidity. We experienced a case of malignant hyperthermia after general anesthesia with halothane and succinylcholine in day surgery center. 2 years old male patient arrived to get congenital ptosis operation. He was relatively healthy and had no considerable past or family history of hereditary disease. Anesthesia induced with halothane inhalation and succinylcholine. After induction, he abruptly showed masseter muscle rigidity, total body rigidity, elevation of end-tidal CO2 tension, tachycardia and hyperthermia. Under the suspicion of malignant hyperthermia, all anesthetics were discontinued and vigorous emergency treatment was attemped with dantrolene sodium. The patient survived without any sequele and discharged after 11 days. About 10 months later, that same patient comes to our hospital to take the operation. We experienced successful anesthetic management for malignant hyperthermia.