This quasy-experimental post-test only with control group study was aimed to examine the effect of bladder training using conventional method and modification of Kozier’s method which was viewed from pattern of voiding, complaint of voiding and the time needed to make voiding back to normal. The participants were taken randomly from the patients with urinary catheter that hospitalized in orthopaedic surgery ward in a hospital in Jakarta. Probability sampling with simple random sampling was used in this study. Chi-square test was employed to examine the different between pattern of voiding and complaint of voiding of treatment group and control group. Independent t test was used to examine the different of time needed in order to void back normally between treatment and control group. With alpha 0,01 for pattern of voiding and 1,00 for complaint of voiding, the result showed that there was no difference of voiding pattern and complaint between treatment and control group. However, there was a significant difference of time needed in order to void back normally between treatment group and control group, with α = 0,05. Therefore, health care institution should have a standard procedure of bladder training and nurses should conduct Kozier modified bladder training method before removing the urinary catheter.