An electronic device is provided. The electronic device includes an external image-capturing module, a receiving recess and a restriction unit. The external image-capturing module is adapted to be received in the receiving recess. The restriction unit is moveable between a first position and a second position, and when the restriction unit is in the first position, the restriction unit abuts the external image-capturing module and restricts the movement of the external image-capturing module, and when the restriction unit is in the second position, the external image-capturing module is released by the restriction unit.