Abstract: A card edge connector (1) comprises an insulative housing (10) having opposite top and bottom walls (12, 14) defining a central slot (142) therebetween for receiving the electronic card, a row of upper contacts (15) and a row of lower contacts (16) retained in the top and bottom walls, respectively. A supporting embossment (1461) is formed in each of the lower passageways. Each of the upper and lower contacts forms a retaining portion (150, 160), a mating beam (152, 162) and a soldering portion (154, 164) extending from opposite ends of the retaining portion, respectively. The mating beam of the lower contact is shorter than the mating beam of the upper contact and is apart from and above the supporting means with a distance which is within the spring limitation amount of the mating beam of a corresponding lower contact retained in the housing.