One embodiment of the present invention relates to a socket device comprising a base, a socket structure and a grounding structure. The base comprises a substrate and a sidewall adjacent thereto, and the substrate comprises a first lateral and a second lateral corresponded to each other. The socket structure is disposed on the sidewall of the base. The grounding structure is disposed on the substrate of the base and comprises a grounding element, a fixing element, a grounding wire, and an insulating plate. The grounding element comprises first and second terminals, wherein the first terminal is protruded from the first lateral of the substrate. The fixing element is substantially disposed on the second lateral of the substrate and connected to the second terminal of the grounding element, so as to fix the grounding element to the substrate.