The disclosure relates to a cable concentrator and an electronic device having the same, where the cable concentrator includes main body and ground partition plate. The main body includes sidewall portions and bottom plate portion together forming accommodation portion to accommodate cable connectors. The bottom plate portion has positive terminal holes and negative terminal holes. The ground partition plate is located in the accommodation portion and divides the accommodation portion. The ground partition plate has ground bent tabs respectively corresponding to the negative terminal holes of the bottom plate portion and are electrically connected to negative terminals on a circuit board and thus grounding the negative terminals.