A high-speed plug-in card connector comprising two terminal assemblies with reversely arranged internal structure and a housing. Each terminal assembly includes a metal sheet, a conductive plastic, and an injection-molded terminal strip. The conductive plastic is formed on the side of the metal sheet by injection molding and connects the metal sheet with a ground terminal of the terminal strip. The conductive plastics of the two terminal assemblies are located in the very middle of the connector. The conductive plastics fix the two terminal assemblies together with a snap-in connection. The housing is clamped at the end on the side where the two terminal assemblies are snapped together.