The invention relates to an electrical connector capable of preventing solder wicking. The electrical connector has an insulating body that includes a plurality of containing grooves and conductives terminals installed in the containing grooves, a solder stop portion extended from a sidewall of the containing groove, the terminal having a main body portion between the solder stop portion and the sidewall, a contact portion extended upwardly from both ends of the main body portion and bent to both sides of the bump stopper and the solder stop portion separately, and a soldering portion extended downwardly from the main body portion and including a diffusion preventing area for separating the main body portion and the soldering portion, and the diffusion preventing area being higher than the lowest point of the solder stop portion.