To provide a keyless locking device for a vehicle door capable of controlling door lock in a keyless way to any door of a vehicle, and securely actuating door lock to the vehicle by installing the minimum number of transmitters.

A transmitter box 14 for the left side is provided at a lower part between a freezer door 8 and a dry storage door 9 on a left side surface of a vehicle 1 for home delivery service, a transmitter box 15 for the rear surface is provided at a lower part between a left rear door 10 and a right rear door 11 on a rear surface of the vehicle 1 for home delivery service, and a transmitter box 16 for the right side is provided at a lower part between a driver's seat door 12 and a refrigerator door 13 on a right side surface of the vehicle 1 for home delivery service. Transmitters and antennas built in the transmitter boxes 14, 15, 16 transmit electric waves to a portable machine 21.