Purpose: To investigate the effect of posterior tibial nerve electrical stimulation (PTN) andsacral surface therapeutic electrical stimulation (SSTES) in the treatment of overactive bladder. Patient and method: Sixty patients were included in this study. Their ages ranged from 14-62 years. They were divided into two equal groups. Procedures: Group(A)received 12weeks of treatment with sacral surface electrode and posterior tibial nerve electrical 15 min three times /week for12 weeks while group (B)received pelvic floor exercises for 15 minutes 3times/week for 12 weeks. Results:  this study revealed that the bladder volume at first desire to void for group (A)as well as for group(B); showed no statistical significant difference, bladder stability in (A)group showed a highly statistical significant  improvement with a percentage 48.69% while for group(B) non significant and by comparing both groups post-treatment, there was a statistical significant difference between groups with high percentage of improvement of the bladder stability in group(A) more than group(B). Maximum flow rate was significantly improved post-treatment, for group (A) with a percentage of improvement 25.2%   while, for group (B)it was with a percentage of improvement 12.37%, and by comparing both groups post-treatment there was a statistical significant improvement in group(A)  more than in group (B). Conclusion PTN and sacral surface therapeutic electrical stimulation (SSTES)  produced objective improvements include urodynamic changes specially bladder stability, and maximum flow rate.