An electrical connector capable of being connected with a FPCB and a PCB stably, includes an insulating housing defining a receiving space at a top portion thereof. A plurality of terminals is received in the insulating housing and each terminal has a contacting portion projecting into the receiving space for being connected with the FPCB. A reinforcement board is received in the receiving space for being fastened together with the FPCB. A slide cover slidably covers on the insulating housing and presses against the reinforcement board. When the electrical connector is soldered to the PCB, the FPCB is electrically connected with the PCB stably for the slider cover pressing against the reinforcement board to make the FPCB connected with the terminals steadily.