Background: Cochlear implants have a dramatic impact on the lives of their reciepients, as well as their family and friends, but there is a risk of vestibular function affection after cochlear implantation as reported by several authors. Objectives: The present study was conducted to evaluate the vestibular system in cochlear implant candidates. Method: A total of 20 adult postlingually cochlear implant candidates were examined. The vestibular function was assessed using ENG. Results: Vestibular function was found in 65% of patients preoperatively. The incidence of vestibular dysfunction was 8.3% postoperatively. Conclusion: The incidence of vestibular dysfunction after cochlear implanation is remarkably lower than that reported by most authors.