An electrical connector includes: an insulating body, having a plurality of terminal receiving holes, in which each terminal receiving hole includes a retaining slot recessed from an upper surface of the insulating body and a receiving slot formed through the insulating body and connected with the retaining slot, and the retaining slot has a bottom surface that forms a step with a sidewall of the receiving slot; a metal layer, plated on the sidewall of the receiving slot, being not higher than the bottom surface; and a plurality of terminals, respectively y accommodated in each terminal receiving hole, in which each terminal includes a retaining portion fixed in the retaining slot, a base and a soldering portion extend downwards from the retaining portion and are suspended in the receiving slot, and a clearance is formed between the retaining portion and the metal layer for preventing a conduction therebetween.