The patient was a 71‒year‒old man. He had started hemodialysis 5 years earlier due to chronic kidney disease caused by autosomal dominant polycystic kidney disease (ADPKD). In year X, he developed fever of 38.5°C and shivers, and was admitted to hospital because a blood test showed an elevated white blood cell count and CRP. MRI DWIBS identified high‒intensity areas in some multiple liver cysts, and plain CT showed iso‒signals in the same areas, suggesting cyst infection. Blood culture led to the detection of Raoultella planticola. We changed the tazobactam/piperacillin to doripenem hydrate on the second day of hospitalization, and added levofloxacin on the fourth day, and both the white blood cell count and CRP showed a tendency to improve. We changed the treatment to oral antibiotics from the 16th day, and he was discharged on the 20th day. Raoultella planticola is an environmental microorganism that lives in soil and water, and infection in patients with normal immunity is rare, with few reported cases. There have been no reported cases of bacteremia considered to be due to cyst infection in ADPKD dialysis patients.