A connector includes an interlock housing to which interlock terminals are provided in addition to a lever that performs connection and disconnection of main terminals with respect to a mating connector. Connection of HVILs is performed in a manner such that after the main terminals are mutually connected through a rotation operation of the lever, a sliding operation of the lever is performed and the interlock housing is pressed down to position the interlock housing on a closing position. Disconnection of the main terminals is performed in a manner such that after the interlock housing is pulled up and positioned on an opening position to mutually disconnect the HVILs, the sliding operation of the lever is performed and the rotation operation of the lever is performed.