An electrical card (100) connector includes an insulative housing (1), a set of contacts (2) received in the housing and a locking portion (17) retained in the housing (1). The housing (1) defines a receiving cavity (10) for receiving an electrical card. The locking portion (17) has an elastic arm (171) connected with the housing (1) and a latching portion (172) extending forwardly from the elastic arm (171) and extending into the receiving cavity (10) to retain the electrical card. The locking portion (17) can deflect along a left to right direction under stress, so the insertion and extraction force of the electrical card insert in and eject out of the receiving cavity (10) moderately, it can not only ensure the electrical card connector (100) lock the electrical card firmly but also ensure the electrical card not be damaged easily.