The present application discloses an interconnection connector including an insulative housing and a number of conductive terminals. The insulative housing includes a base portion and a mating portion adapted to mate with a mating connector. Each conductive terminal includes a contact portion positioned in the mating portion and an abutment portion located on the base portion. The contact portions are adapted for being electrically connected to the mating connector, and the abutment portions are adapted for contacting a conductive pad of a flexible flat cable. Besides, a connector assembly including the interconnection connector is also disclosed. The present application simplifies the mating structure by providing the abutment portions on the base portion to contact the conductive pads of the flexible flat cable, thereby easily to achieve electrical connection between the conductive terminals and the flexible flat cable.