An electrical connector includes an insulating housing having a mating cavity and a contact module. The contact module comprises at least one contact group and an insulative component, the one contact group has a first power contact and a second power contact, each one of the first power contact and the second power contact has a retaining portion, at least one contacting portion and at least one soldering portion. The retaining portions of the first power contact and the second power contact in one contact group are arranged in a height direction in the insulative component, the contacting portions of the first power contact and the second power contact in one contact group are arranged in a transverse direction of the insulating housing, the soldering portions of the first power contact and the second power contact in one contact group are arranged in a front-and-back direction.