A SATA connector including an insulative housing and a plurality of terminals are provided. The insulative housing has a plurality of slots into which external terminals are inserted, and the slots run through the insulative housing from a front side to a rear side. The terminals include a plurality of mating portions inserted into the slots and a plurality of extending portions led from the rear side of the insulative housing. Ends of the extending portions are collected on the rear side of the insulative housing to form a plurality of contact pads for electrically coupling to a flexible flat cable. An electrical connector assembly including the above-mentioned SATA connector is further provided.