An electrical card connector 100 includes a dielectric housing or base 1, a number of contacts 2 received in the housing or base 1, and a metal shell 3 covering the housing or base 1, both sides of the housing or base 1 having passageways or positioning slot 10, both side of the metal shell 3 having beams 321 embedded into the passageways or positioning slot 10. The beams 321 mating the passageways or positioning slot 10 in an elongated direction increase the function area between beams 321 and passageways or positioning slot 10, which makes the electrical card connector 100 stable.