A folding electric scooter comprises a chassis. The front end of the chassis is disposed with a front wheel and a handlebar used to control the direction of the front wheel. The handlebar is a folding structure. The rear end of the chassis is pivotally coupled with a rear rack. The rear rack is disposed with a rear wheel, a motor and a battery. The motor and the battery are used to offer the power to the rear wheel. In addition, the rear rack is disposed with a folding four-bar linkage, which forms the seat. By such arrangements, when the folding electric scooter is not in use, the four-bar linkage can be folded to fold the seat, and the handlebar can be synchronously folded, thus minimizing the whole volume to facilitate the transportation and the storage.