Patent attributes
A consciousness state determination system comprises a first image-taking section which is mounted on a vehicle and takes images of a driver of the vehicle, an electronic control unit which executes a consciousness state determination process of determining whether the driver is conscious, based on a first image corresponding to the image of the driver taken by the first image-taking section, and a mobile terminal carried by the driver. The electronic control unit is configured to determine whether the driver is conscious, based on terminal-side information corresponding to information acquired by the mobile terminal when a predetermined condition that a reliability level of a determination result obtained from the consciousness state determination process is presumably low, becomes satisfied.