To provide a security device of vehicle capable of directly informing a user of the occurrence of abnormality and enabling a personal security control of vehicle, recording image of a vehicle theft site, preventing the abnormal action and malfunction of the security device of vehicle caused by a temperature rise in the case of parking in the scorching sun, and easily securing an operation power source when an engine is not in operation.

A car navigation device to which the security device of vehicle is adopted is mounted on a vehicle, and information to inform the occurrence of abnormality and image data of the site imaged by a camera 3 is transmitted to a transmission terminal 21 owned by the user by a radio transmission circuit via a transmission part 15 when the abnormality is detected by an abnormality detection part 2 or an abnormality detection function of a control part 9.