Idiopathic sudden sensorineural hearing loss (ISSNHL) in children is rare, accounting for less than 10% of all sudden deafness. The etiology of ISSNHL is uncertain, but viral infeqction and the distribution of blood circulation in the inner ear are suspected as the causes of the disease. Therefore, stellate ganglion block (SGB) and antiviral agent have been used for its treatment. Recently we experienced an effective series of 12 SGBs in pediatric patient with ISSNHL, with no severe complication.