To provide an anti-theft device of an automobile capable for previously preventing the theft of the automobile.

The anti-theft device (1) for the automobile is provided on the automobile (2) and equipped with a hands-free device (12) and an automobile control device (13). The hands-free device (12) can communicate with a device (10) when the device (10) carried by a user of the automobile (2) exists in a predetermined range. The predetermined range is the range which extends from the hands-free device (12) to the outside of the automobile (2) by the predetermined distance. The automobile (2) is provided with a drive control part (7) traveling the automobile (2) according to the instruction of the driver riding on the automobile (2). The automobile control device (13) permits the instruction of the driver riding on the automobile (2) as the permission of the traveling of the automobile (2) when the hands-free-device (12) is communicating with the device (10).