An object detection device is provided with a noise state determination unit and a noise information processing unit. The noise state determination unit determines whether a reception state of exogenous noise in an object detecting sensor is a high noise state, while the object detection condition is valid. When it is determined that the noise notification processing unit is a high noise state, noise related notification corresponding to a generation of a restriction in the object detection function as a result of the high noise state is executed. The object detection device provides a difference in the noise related notification depending on a detection state of an object and a running state of an own vehicle.