An electrical connector includes a fastener plate, a rail frame pivotally mounted to one end of the fastener plate, a carrier frame assembled to the rail frame in a sliding manner, and a load plate pivotally mounted to the end of the fastener plate outside of the rail frame. The carrier frame includes latches to retain the CPU thereon. The rail frame includes a pair of opposite sliding channels extending in the front-to-back direction, along which the carrier frame is moveable. A front transverse bar is located in front of the sliding channels. A pair of protection blocks are located in front of the pair of sliding channels for protecting the latches of the carrier frame or the CPU.