An electrical connector comprises a plurality of terminal blocks arranged along a transverse direction. The terminal block includes a vertical insulative plate, a pair of first terminals, and a pair of second terminals. The first terminal includes a first deflectable contacting arm and a first connecting foot. The second terminal includes a second deflectable contacting arm and a second connecting foot. The first deflectable contacting arm and the second deflectable contacting arm are arranged one by one along the transverse direction. The first deflectable contacting arms of the pair of first terminals bend in a face to face style to form an inserting space in the vertical direction. The second deflectable contacting arms of the pair of second terminals bend in a face to face style to form the inserting space in the vertical direction.