The group A streptococcus is capable of producing exotoxins that have been linked to a toxic shock-like syndrome. Streptococcal toxic shock syndrome is a rapidly progressive associated with injury to multiple organ systems and a 30-60% mortality rate. These cases are very rare in Korea. We present a case of 32-year-old pregnant woman who developed streptococcal toxic shock syndrome following intrauterine fetal death. She manifested hypotension, shock, increased level of creatinine, disseminated intravascular coagulopathy, liver impairment, renal failure, pulmonary edema and adult respiratory distress syndrome. Blood cultures yielded Streptococcus pyogenes. After 17 hours on admission, she died in spite of massive transfusion, antibiotics therapy and ventilatory support. Clinicians should be alert to the importance of early diagnosis and treatment of this lethal infection.