To elucidate the impact of simple hysterectomy upon the urodynamic findings of patients with preinvasive cervical cancer, twenty-five patients with cervical cancer at stage 0 who underwent simple hysterectomy were recruited. Each patient underwent a urodynamic study prior to and 3 months after simple hysterectomy. McNemar test and paired t -test were utilized for analysis. The median age of the 25 patients was 44 years with a median parity of 3. Comparing the urodynamic parameters of both bladder voiding and storage functions pre- and post-surgery, besides residual urine volume and functional urethral length, we did not find significant impairments postoperatively in all 25 cases. We concluded that simple hysterectomy does not adversely affect urinary functions after surgery.