A electrical connector structure includes ground terminals formed in two rows, which are fixed into two bases respectively, in which each of the ground terminals includes a contact portion, a soldering portion and a main body is connected to the contact portion and the soldering portion, and each main body is fixed into the bases, and each soldering portion extends out of the bases; and a ground member including two ground plates, in which the ground plates covering surfaces of the bases, respectively, and a surface of each ground plate has a plurality of contact arms protruding, the contact arms are electrically contacted to the ground terminals, respectively, in which two ends of each contact arm contact the ground plates, respectively.