The vestibular fold lies superior to the vocal fold and extends from the thyroid cartilage to the arytenoid cartilage.

The vestibular folds play little or no part in voice production; they are protective in function. They consist of two thick folds of mucous membrane enclosing the vestibular ligaments. The space between these ligaments is the rima vestibuli. The lateral recesses between the vocal and the vestibular folds are the laryngeal ventricles.