A vehicle (1, 1A, 1B, 1C, 1D, 1E, 1F, 1G) capable of travelling in an automatic driving mode and comprising a vehicle system and a vehicle illumination device (4, 4A, 4B, 4C, 4D, 4E, 4F, 4G) configured to display information relating to automatic driving of the vehicle (1, 1A, 1B, 1C, 1D, 1E, 1F, 1G) toward an outside of the vehicle, the vehicle illumination device comprising an illumination unit (42, 42a, 42b, 42c, 42D, 42E, 42F, 42G) configured to irradiate light toward the outside of the vehicle and over an entire circumference of the vehicle in a horizontal direction, the vehicle characterized in that it is capable of travelling in four driving modes including: - a fully automatic driving mode in which the vehicle system automatically performs all of the travelling controls of the steering control, the brake control and the accelerator control and the driver is not in a state where it is possible to drive the vehicle; - an advanced driving support mode in which the vehicle system automatically performs all of the travelling controls of the steering control, the brake control and the accelerator control, and the driver does not drive the vehicle; - a driving support mode in which the vehicle system automatically performs a part of the travelling controls of the steering control, the brake control and the accelerator control, and the driver drives the vehicle under the driving support of the vehicle system; and - a manual driving mode in which the vehicle system does not automatically perform the travelling controls, and the driver drives the vehicle without the driving support of the vehicle system, in that the vehicle illumination unit (42, 42a, 42b, 42c, 42D, 42E, 42F, 42G) is configured to adopt a different illumination state (S 1-S4) for each of the four driving modes, and in that the information relating to the automatic driving of the vehicle includes information indicating a transition state of a driving mode of the vehicle (1, 1A, 1B, 1C, 1D, 1E, 1F, 1G). - a fully automatic driving mode in which the vehicle system automatically performs all of the travelling controls of the steering control, the brake control and the accelerator control and the driver is not in a state where it is possible to drive the vehicle; - an advanced driving support mode in which the vehicle system automatically performs all of the travelling controls of the steering control, the brake control and the accelerator control, and the driver does not drive the vehicle; - a driving support mode in which the vehicle system automatically performs a part of the travelling controls of the steering control, the brake control and the accelerator control, and the driver drives the vehicle under the driving support of the vehicle system; and - a manual driving mode in which the vehicle system does not automatically perform the travelling controls, and the driver drives the vehicle without the driving support of the vehicle system, in that the vehicle illumination unit (42, 42a, 42b, 42c, 42D, 42E, 42F, 42G) is configured to adopt a different illumination state (S 1-S4) for each of the four driving modes, and in that the information relating to the automatic driving of the vehicle includes information indicating a transition state of a driving mode of the vehicle (1, 1A, 1B, 1C, 1D, 1E, 1F, 1G).