Infectious complications remain a major cause of morbidity and mortality among transplant recipients. Urinary tract infection (UTI) is the most common infectious complication in kidney transplant recipients with a reported incidence of between 25%-75%. This varies widely likely due to differences in definition, diagnostic criteria, study design, and length of observation. We sought to review the incidence and importance of urinary tract infection on graft survival, related risk factors for UTI, and its impact on renal graft, showing the uncertainty that still exists in these issues because of the lack of prospective data and clinical trials.