Churg-Strauss syndrome (CSS) is a rare systemic vasculitis that is accompanied by asthma and peripheral eosinophilia. We report herein a case of a 32-year-old man with untreated CSS complicated by intracerebral hemorrhage (ICH) in the right basal ganglia. On admission, a hematologic examination revealed eosinophilia and increased perinuclearantineutrophil cytoplasmic antibody levels. A thorough stroke risk-factor evaluation was conducted, but the only risk factor found was CSS. This is the first case of CSS complicated by ICH reported in Korea. Key Words: Churg-Strauss syndrome, Intracerebral hemorrhage