Illumination device for vehicle and illumination device

An illumination device for a vehicle comprising:

• a recognition part configured to recognize other object that might be present on an advancing route of a vehicle;
• a detection part configured to detect that a driver of the vehicle has recognized the other object;
• and
• an exterior light provided at a position in an exterior region of the vehicle which is visible to the other object and configured to be turned on and off,
• wherein, when the recognition part has recognized that there is a possibility that the other object is going to be present on the advancing route and when the detection part has detected that the driver has recognized the other object, the exterior light is brought into either a first lit or first not-lit state,
• when the recognition part has recognized that there is a possibility that the other object is going to be present on the advancing route and when the detection part has detected that the driver has not recognized the other object, the exterior light is brought into either a second lit or second not-lit state, and
• the first lit state and the second lit state are different from each other, and the first not-lit state and the second not-lit state are different from each other.