Abstract: A card connector (2) comprises a header connector (20),two arms (21) extending forwardly from lateral edges of the header connector and a reinforcing beam (22) being integral with the arms. Each of the arms defines a guiding groove (210) and an upper flange (211) above the groove. The reinforcing beam is configured to have a front edge (221) with a flat middle portion (222) and two side portions (223) beside the middle portion. The side portions incline forwardly and sidewardly from the middle portion toward the guiding arms to connect with the upper flanges of the guiding arms, respectively. The reinforcing beam has a thickness smaller than that of the upper flange.