We report a case of a 34-year-old man who suffered from pheochromocytoma with an abscess in the right adrenal. He presented with a high fever and back pain. He also had some episodes of headache and palpitation. Serum and urine catecholamine levels were elevated. From computed tomography and (123)I-meta-iodobenzylguanidine scans, his condition was diagnosed as pheochromocytoma with an abscess. Two pairs of blood cultures yielded Streptococcus agalactiae, which was believed to be derived from dental caries. He was successfully treated with antibiotics for his abscess and right adrenalectomy for his pheochromocytoma.