A connector comprises a plurality of signal terminals, a plurality of ground terminals which are configured to be connected to outer conductors of cables, and a ground member which is configured to be connected to the outer conductors. The ground member has a ground portion. The signal terminals and the ground terminals are alternately arranged in a pitch direction (Y-direction) to form one terminal row. Each of the signal terminals has a first adjustment portion. Each of the ground terminals has a second adjustment portion. The signal terminals include an outer signal terminal located at an end of the terminal row. The first adjustment portion of the outer signal terminal protrudes toward the ground portion. A position of the first adjustment portion of the outer signal terminal in a perpendicular plane (XZ-plane) is equal to or overlaps with a position of the ground portion in the perpendicular plane.