Background: The lower urinary tract functions may be affected by pelvic surgeries as there is a possibility to destroy the integrity of the pelvic plexus as well as sympathetic and parasympathetic nerves controlling bladder filling and voiding. Aim of the Work: This study was performed to assess the effects of total and subtotal abdominal hysterectomy on the lower urinary tract functions by urodynamic measures. Patients and Methods: 60 patients who were decided to have subtotal hysterectomy were included in group A while 60 patients who were decided to have total hysterectomy were included in group B. Urinary tract symptoms were assessed by questionnaire then cystometry and uroflowmetry were done preoperatively and 6 months postoperatively and pelvic organ prolapse was assessed by POP-Q.Results: This study showed significant improvement in urgency in the subtotal hysterectomy group and improvement in nocturia in total hysterectomy group. Also there was significant decrease in the maximum flow rate and increase in the voiding time in the total hysterectomy group. The 1st sensation was delayed in both groups while the 2nd sensation was significantly delayed in total hysterectomy group. Conclusion: Hysterectomy whether total or subtotal does not adversely affect the urinary bladder functions clinically despite occurrence of some changes in the urodynamic parameters.