Aim and Objectives The aim of this was to examine the effect of bladder training on bladder functions. Background Urinary catheterization is frequently performed in order to evaluate the outcomes of the surgical procedures and to monitor the urine output after urology operations. Design and Methods This quasi‐experimental study was conducted in the urology clinic in Istanbul, Turkey in which 50 males were nonrandomly assigned to either a bladder training (n = 28) or a control group (n =22). In the bladder training groups, the urinary catheters of the patients were clamped at 4‐hr intervals and then were left open for 5 min on the second postoperative day. This study was created in accordance with TREND Statement Checklist. Results The first urgency time and the first voiding time were longer, and the prevoiding and the voiding volumes were higher following the removal of the catheter in the training group (p = 0.001). In addition, the evaluation of the patient bladder diaries in the first three days after the discharge period revealed that the daily frequencies of micturition and nocturia were lower (p = 0.04), the mean duration of intervals between the micturition was longer (p = 0.006), and the mean voided urinary volume was higher (p = 0.024) in the training group. Conclusion At the end of the study, it is observed that bladder training performed by clamping the catheter on postoperative day 2 after Transurethral Resection of Prostate (TUR‐P) operation is a significant positive effect on the storage symptoms of the patients. Relevance to clinical practice Before removing the urinary catheter, bladder training programme affects positively to patients, especially prevoiding and the voiding volumes, the daily frequencies of micturition and nocturia on postoperative periods.