Dual-slot card connector capable of avoiding erroneous insertion of two cards at once

A dual-slot card connector capable of avoiding erroneous insertion of two cards at once, comprising:

• a flat base having a first insertion slot and a second insertion slot for receiving different electronic cards respectively, said first and second insertion slots partially overlapping each other and communicating with each other, said base having a pair of receiving grooves and a pair of first retaining portions, each pair of which are located at bilateral sides of said first insertion slot respectively;
• a movable plate mounted to the overlap of said first and second insertion slots and movably installed in said receiving grooves, said movable plate having a main body, a pair of receiving portions formed at bilateral sides of said main body, a pair of second retaining portions in connection with said first retaining portions respectively, and a plurality of terminal grooves formed on said main body;
• a pair of springy strips mounted to said base and contacting against said movable plate;
• a cover shell covered on said base;
• and
• a plurality of contact terminals mounted on said base, wherein parts of said contact terminals are received in said terminal grooves of said movable plate.