Disclosed is a vehicle antitheft device not requiring a contract with a security company, etc., and increasing a vehicle antitheft effect. In the vehicle there are provided a camera or a microphone, and a control device for distinguishing a face or voice of a human by means of an image or sound captured by the camera or microphone, and based on distinction results, executing vehicle theft prevention control operations. The camera is provided at a position capable of capturing a normally seated driver and the outside through a window next to a driver's seat. Further, in the vehicle there is provided a radio communications unit. The control device records the captured image from the camera, judges whether the it is the face image of the person, and if it is, performs control so that the image is sent to a given reporting destination via the radio communications unit.