A connector includes a movable housing, a fixed housing, plural signal terminals, and a pair of power source terminals. Each of the power source terminals is formed in an elongated shape with a length in a span direction as viewed along an insertion/removal direction, spans between a pair of sidewalls, includes a span direction intermediate portion retained by a terminal array direction end portion of the movable housing, and includes second elastic portions each capable of undergoing elastic deformation at a location positioned between the movable housing and the pair of sidewalls.