Abstract: An electronic device is provided, and the electronic device includes a base, a cover plate, and a bezel. The base has a sidewall where an opening portion is formed. An airflow selectively passes through the opening portion. The cover plate is pivotally connected to the base. The bezel is movably connected to the cover plate, wherein the bezel is rotated facing the opening portion selectively. The arrangement of the bezel may reduce the gap between the bezel and the down edge of the opening portion of the base, reducing the airflow flowing downward back to the heat-dissipation mechanism in the base. Therefore, the heat-dissipation efficiency of the electronic device is enhanced.