Electrical connector

An electrical connector for conducting a chip module to a circuit board, comprising:

• an insulating body, wherein the insulating body has a bottom plate, a plurality of receiving slots are disposed in the bottom plate, each of the receiving slots has two opposite first side walls, and a second side wall and a third side wall connected with the two first side walls and opposite to each other, a protruding block protrudes from the second side wall toward the third side wall, and the protruding block is separated from the two first side walls and the third side wall;
• a plurality of terminals correspondingly received in the receiving slots, wherein each of the terminals has a flat plate portion, an elastic arm and a material connecting portion extending upward from the flat plate portion, a contact portion formed at a top end of the elastic arm to upward and elastically urge against the chip module, and two clamping portions bending and extending from the two opposite sides of the flat plate portion along a horizontal direction, and the flat plate portion and the material connecting portion are limited between the protruding block and the third side wall;
• and
• a plurality of tin balls respectively and correspondingly fixed between the two clamping portions of corresponding one of the terminals, and soldered to the circuit board, wherein the tin balls are positioned below the protruding block and are prevented from moving upward.