To surely prevent shut-in of a key by giving a warning to an outer handle itself by a warning control circuit when opening the outer handle when confirming the presence of an inserting key and a door lock closed state.

The car body side 1 is provided with a detecting circuit 4 of a key K, a door lock state detecting circuit 5 and a keyless signal receiver 7 for receiving a signal of an external keyless signal transmitter. These output signals are inputted to a discriminating circuit 20 on the door side 2, the discriminating circuit 20 discriminates a situation to put a door lock mechanism 23 in a closed state, and can give a warning such as vibration to the hand of a driver giving opening operation to an outer handle 22 for closing a door by starting a door opening motor M. A link 25 can give vibration to the outer handle 22 and/or open/close the door lock mechanism 23 by a long hole and a cam mechanism fitted to this and/or a clutch mechanism.