We report a case of rapidly progressive encephalopathy and generalized chorea due to HIV encephalitis. The patient was a 24-year-old man known to be HIV-seropositive for 4 years. The severity of the movement disorder resulted in rhabdomyolysis. Sepsis developed and he died after a 21-day hospitalization. Pathologic study revealed prominent neuronal loss and gliosis of subcortical regions. Acute encephalopathy with generalized chorea may be a rare consequence of HIV encephalitis.