A card structure includes a first substrate, a second substrate, and a connector. The first substrate includes a base surface, wherein at least one electronic part region and a terminal region are disposed on the base surface. The second substrate is disposed on the base surface and is coupled to the terminal region of the first substrate. The connector is disposed on the base surface to juxtapose the second substrate. The connector includes a connecting surface, a contact unit, and a plurality of contact regions disposed on the connecting surface and coupled to the contact unit and the terminal region, such that the plurality of contact regions are coupled to the second substrate via the terminal region of the first substrate.