A card reader includes: an insulating casing having a plurality of terminal openings, a plurality of first insertion slots and a plurality of second insertion slots, the terminal openings being provided at a rear end of the insulating casing, the first insertion slots being provided at intervals on upper ends of the terminal openings, the second insertion slots being provided at intervals on lower ends of the terminal openings; a plurality of first conductive terminals lodged in the first insertion slots of the insulating casing respectively; and a plurality of second conductive terminals lodged in the second insertion slots of the insulating casing respectively. Via this arrangement, the thickness of side walls of the first insertion slots and the second insertion slots is larger, so that the side walls of the first insertion slots and the second insertion slots may not crack easily during formation.