Urinary tract infections (UTIs) are among the most common entities in hospitals, accounting for about 40% of nosocomial infections. It is said that more than 80% of UTIs are associated with the use of catheters. The discharge opening of the Uro Bag, a type of urine storing bag, is alive with bacteria. The microorganisms can enter the bag and then bladder, causing UTIs. It can also be said that the longer the catheters are used, the greater the risk of catheter-related UTIs becomes. Furthermore, Pseudomonas aeruginosa, Staphylococcus aureas, Serratia mareescensand other kinds of bacteria that have acquired the resistance to drugs are increasing. The incidence of mixed infections with different organisms are on the rise. Such being the present situation, to prevent UTIS we think that the proper management of urinary catheterization and right use of urethral catheters are of the primary importance. Those health providers who handle catheters frequently need to take every precaution against inadvertently acting as intermediaries in the incidence of nosocomial infectious diseases including catheter-related UTIs. Recently, we reviewed the prophylactic measures which had been taken by our hospital, assessed the findings using the checklist made by the Nosocomial Infection Prevention Committee. Later, we held a seminar and discussed the standardization of prophylactic measures. As a result, the assessment items which were rated low in June marked 100% in September and March. Thus, our efforts have led the hospital employees to deepen their knowledge and understanding of the need to watch out nosocomial infection constantly. For the guidance of employees, we included in the educational program on-the-job training, which proved to be helpful for the trainees to have imagery. To maintain the effect of infection prevention and to keep up the interest awakened in the hospital staff, the holding of seminars and meetings for reviewing on a regular basis are called for.