Erythropoietic protoporphyria is a genetic disorder due to a deficiency of ferrochelatase resulting in excessive accumulation and excretion of protoporphyrin. The predominant clinical feature is photosensitivity. Severe hepatic failure occurs in a small percentage of patients, and neurological symptoms are very rare. We report a case of erythropoietic protoporphyria associated with severe hepatic dysfunction and neurological symptoms. A 9-year-old girl presented with severe abdominal pain, nausea, weakness and pain of extremities, and urinary retention. Ultrasonogram and abdominal CT scanning revealed a diffuse infiltrated and enlarged liver. Liver biopsy showed deposition of dense dark brown pigment within the bile, hepatocytes and Kupffer cells. Plus, dense dark brown deposits gave a red birefringent under polarize light. Porphyrin studies demonstrated markedly elevated serum free erythrocyte protoporphyrin. This girl was diagnosed as erythropoietic protoporphyria with severe liver dysfunction and neurological symptoms.