LANE DEPARTURE SUPPRESSION DEVICE

A lane departure suppression device: executes automatic steering control when a lane departure condition is satisfied while an automatic steering permission condition is satisfied; executes warning control such that a level of a warning is a predetermined warning level when a departure avoidable condition is not satisfied, the departure avoidable condition being satisfied when the automatic steering permission condition is satisfied, in a case where the automatic steering control is not being executed when a warning execution condition is satisfied; and does not execute the warning control or executes the warning control such that the level of the warning is a level lower than the predetermined warning level when the departure avoidable condition is satisfied, in the case where the automatic steering control is not being executed when the warning execution condition is satisfied.