The disclosure provides a socket connector including a housing, a circuit board, an electronic device, a contact element, and a switch component. The housing has an insertion hole configured for an insertion of a plug connector. The circuit board is fixed in the insertion hole. The electronic component is disposed in the insertion hole. The contact element is located in the insertion hole. The contact element has a fixed end and a movable end, the fixed end is electrically connected to the circuit board, and the movable end is movable with respect to the circuit board. The switch component is movably located in the insertion hole and is in contact with the contact element. The switch component is configured to be movable by the plug connector so as to force the movable end of the contact element to electrically connect to or disconnect from the electronic component.