Abstract: An electrical connector includes a housing member and a number of contacts attached to the housing member. The contacts include a number of first contacts and second contacts arranged side by side along a transverse direction, respectively. The second contacts include a first pair of differential contacts, a second pair of differential contacts and a grounding contact disposed therebetween, the first contacts and the first and the second pairs of differential contacts are used for being soldered to the PCB while the grounding contact needn't be soldered to the PCB. The grounding contact includes a grounding tab to attach to the metal shell for grounding purpose. As a result, a much integral space between the first and the second contacts can be provided for receiving a fiber optical lens module.