LANE DEPARTURE SUPPRESSION DEVICE

A lane departure suppression device includes an object information acquisition device configured to acquire object information around a vehicle, and an electronic control device. The electronic control device is configured not to execute lane departure suppression control when determination is made that there is a possibility or a fact of lane departure of the vehicle and that a driver intends the lane departure. The electronic control device is configured to execute at least issuance of alert as the lane departure suppression control when the determination is made that there is the possibility or the fact of the lane departure of the vehicle and that the driver intends the lane departure but determination is made that a traveling lane of the vehicle is a lane-off prohibition lane or an overtaking prohibition lane based on the object information.