Abstract: A card medium having embossed patterns, which is capable of preventing forgery of the embossed patterns by charging a resin into each of concave portions defined in the back of the card medium according to the embossing of the patterns or affixing a film for covering a concave-portion region to the back thereof.

Abstract: An electrical connector for electrically connecting to a card medium having electrical connecting terminals. The electrical connector includes a case having a horizontal surface including opposite first and second sides, and an inclined surface including opposite third and fourth sides, wherein the fourth side is connected to the first side and the inclined surface is inclined so as to descend from the fourth side toward the third side. Supporting structure is provided opposite to the inclined surface for supporting contacts provided at the side thereof opposite to the inclined surface. A fixing structure is provided for fixing the card medium when the card medium is inserted between the inclined surface and the contacts in a state where the electrical connecting terminals contact the corresponding contacts.