Adult onset Still's disease (AOSD) is a rare systemic inflammatory disease that is basically an adult onset of juvenile rheumatoid arthritis, and the manifestations include fever, rash, arthritis and other organ involvement. The
typical skin rash of AOSD is evanescent, erythematous maculopapular lesions. We report here on a rare case of AOSD in a 29-year-old female patient who presented with high fever, erythma multiforme-like skin eruption,
arthritis and sore throat. She was diagnosed with AOSD according to the diagnostic criteria of Yamaguchi.