Abstract: The deterioration of the signal characteristic of a differential transmission connector is improved. The connector connected electrically with a plurality of cables each including a pair of signal lines and a pair of drain lines includes a pair of adjacent signal contactors connected with the pair of signal lines of the cable, a ground contactor connected with at least one drain line of the cable, a carrier on which the pair of signal contactors and the ground contactor are alternately arranged on the same plane in a line in the width direction perpendicular to the axial direction of the cable, and a first metal shell covering at least a part of the ground contactor, a part of the signal contactors and a part of the carrier. The connector is characterized in that the first metal shell has at least one ground contactor and a first contact.