A connector structure includes an enclosure; a plurality of ground units arranged in the enclosure and respectively including a carrier plate and a plurality of ground terminals electrically connected to one another and associated with the carrier plate; a plurality of signal units arranged in the enclosure side by side to locate between any two adjacent ones of the ground units, and the signal units respectively including a carrier plate and a plurality of signal terminals associated with the carrier plate; and a ground connecting member connected to the carrier plates of the ground units and the signal units. With these arrangements, the connector has simple structure and can be easily assembled for use, and the ground units are connected to the ground connecting member to thereby effectively prevent electromagnetic interference during signal transmission and ensure increased transmission rate.