Background: Cochlear implantation is the treatment of choice for children and adults with severe-to-profound hearing loss. Acoustically evoked stapedius reflex (SR) is important for assessment of the individual dynamic spectrum of the implanted speech process and values measured intraoperatively are influenced by anesthetics Hence, the technique of anesthesia plays a crucial role in success of cochlear implant surgery. The study was designed to compare the effects of equipotent doses of propofol and sevoflurane on the intraoperative evoked stapedius reflex threshold (ESRT) and evoked action potential (ECAP) during cochlear implantation in children and to evaluate the relation between intraoperative ESRT & ECAP and the postoperative measured maximum comfortable level & threshold level. Methods: The current study included 30 children who were scheduled for cochlear implantation , aged 4-12 years old with ASA I-II. Patients were divided into two groups (Propofol-group) & (Sevo-group) 15 of each. Under general anesthesia ,standard monitors were applied, propofol and Sevoflurane dosages were adjusted to maintain target BIS levels between 40-60. Intra-operative measurements are HR, MAP, BIS, ESRT and ECAP values at the electrodes 20, 15, 5.Results: There was statistically significant differences between both groups as regard the differences between Intraoperative stapedius reflex threshold (ESRT) values & postoperative C-level at the three electrodes 20, 15, 5. it was obvious that the differences in the Sevo -group was higher than that of the Propofol -group ( p value < 0.5). but there were no statistically significant differences between the Intraoperative ECAP and the postoperative C-level values at the same three electrodes either in both groups( p value > 0.05) . Conclusion: The study revealed that the use of BIS monitoring of great value especially during stapedius reflex measurements values where we need a defined level of anaesthesia. Sevo has high suppressive effect on intraoperative ESRT that could lead to false high values of the post operative predictive C-level which carry the risk of post operative implant rejection. Propofol has minimal suppressive effect on the intra-operative ESRT and so preferred for measurement of the ESRT. ECAP is not affect by the anesthetics