A connector includes terminals, and a movable housing capable of displacing with respect to a mounting target. The terminals include displacing portions that displace together with the movable housing, and the displacing portions include one side contact portions that contact a connection target from a one-side. The inner connector includes add members retained in the movable housing. The add members include other-side contact portions that contact the relay connector from an other-side. The add members are formed as separate bodies to the terminals.