A uremic patient developed subhepatic abscess, Porphyromonas gingivalis bacteremia and cytomegalovirus viremia after a renal transplantation in mainland China. P. gingivalis infection has been reported to cause gingivitis and periodontitis. Bacteremia due to P. gingivalis, however, has not been reported in the literature. We report herein a case of subhepatic abscess and bacteremia due to P. gingivalis in a renal transplant recepient who was treated successfully with the well functioning renal graft.