A 58-year-old male with alcoholic liver cirrhosis and a 58-year-old male with diabetes mellitus presented with high fever and urinary retention. Prostatic abscess was diagnosed by a computed tomography scan, which showed fluid collection in the prostate in both patients. Despite systematic antibiotic therapies, urinary retention persisted even after fever diminished. They underwent prostatic abscess drainage by transurethral resection (TUR). Urinary retention was released, and the recurrence of prostatic abscess has not been observed after TUR.