A lane deviation prevention control device for a vehicle includes a target steering torque calculator, a rate limit processor, and a rate limit value calculator. The target steering torque calculator calculates target steering torque to be applied to a steering system of an own vehicle in a lane deviation prevention control. The lane deviation prevention control includes preventing the own vehicle from deviating from a lane on which the own vehicle is traveling. The rate limit processor performs rate limit processing. The rate limit processing includes limiting a speed of change in the target steering torque to a rate limit value. The rate limit value calculator calculates the rate limit value in accordance with a deviation state of the own vehicle from the lane.