To make it possible to eliminate anxiety against operational failures affected by external electro-magentic wave noises and lock and unlock with precision.

In a vehicle keyless door lock device having a transmitter which transmits a signal by infrared rays, a receiver 2 which receives the signal transmitted from the transmitter, door lock actuators 4a and 4b which lock and unlock vehicle doors 3a and 3b and a control device 5 which controls the operation of the door lock actuators based on the signal transmitted from the receiver, signals are transmitted from the receiver to the control device by way of a space transmission means for infrared rays and so forth. In addition to that, the receiver is provided on the lower edge of a room mirror 7 hanging from a ceiling 6 of a car room.