An electronic device includes a main body, a circuit board, a receiving space defined in one side of the main body, a plurality of USB ports and a driving module. The receiving space includes a plurality of sets of fixed contacts on a bottom thereof, and the fixed contacts are electrically connected to the circuit board in the main body. The plurality of USB ports are slidably received in the receiving space, and each USB port comprises a set of external contacts. The driving module is configured to push one of the USB ports to a first position, wherein the USB port is able to slide from the first position to a second position where the set of external contacts of the USB port engages one of the plurality of sets of fixed contacts, which electrically connects the one of the USB ports with the circuit board.