An electrical connector includes an insulative housing and a plurality of power contact pairs. The insulative housing has a main section, a mating section extending forwardly from the main section, and a plurality of contact-receiving passageways extending along a front-and-back direction. The power contact pairs are mounted in the corresponding contact-receiving passageways of the insulative housing and divided into two opposite rows in a height direction according to contacting portions, and each power contact pair has two power contacts, each power contact defines a flaky retaining portion held in the relative contact-receiving passageway, a number of contacting portions extending forwards from the retaining portion and a soldering portion extending from a rear end of the retaining portion. The contacting portions of two power contacts in each power contact pair are arranged alternately and cyclically.