We experienced four cases of laryngeal paralysis associated with due to reactivation of the varicella-zoster virus (VZV). In all cases, the titers of the EIA antibody (IgG) were markedly increased. All patients were treated with an anti-viral agent and steroid. After treatment, there were no residual signs of the disease in all cases. In cases of unilateral cranial nerve palsy in which vesicles are either present or absent, herpes zoster should be considered and early treatment with anti-viral agent and steroid should be performed.