NOTIFICATION DEVICE

The notification device includes an abnormality recognition unit that recognizes an abnormality existing on a road shoulder of an oncoming lane or an oncoming lane based on a detection result of an external sensor provided in the vehicle, an external notification unit that is provided in the vehicle and outputs at least one of sound and light toward the outside of the vehicle, and a notification control unit that performs notification by the external notification unit to an oncoming vehicle traveling on the oncoming lane so as to approach the vehicle in front of the vehicle. The notification control unit determines a notification time according to at least one of an estimated vehicle speed of the oncoming vehicle and a risk degree set in advance according to the type of abnormality.