Postherpetic neuralgia (PHN) is a sequela of acute herpes zoster infection and is defined as pain persisting more than 1 month. The patients with PHN suffer from a persistent neuropathic pain. There are many treatments for PHN but some people occasionally do not respond to the conventional therapies. Neurodestruction using neurolytic agents are beneficial to patients with severe intractable pain because of it's prolonged pain-relief and simplicity, inexpensiveness. We report a case that we managed successfully a patient with intractable thoracic PHN using intrathecal alcohol neurolysis.