A pollen eliminating apparatus 10 which is a dust reducing apparatus applied to an automobile 12 includes an air cleaning apparatus 14 which is provided independently from an air conditioning system of the vehicle and which is disposed on a floor 16 in a passenger compartment for suctioning air from a lower position of the passenger compartment. The air cleaning apparatus allows the suctioned air to pass through a filter, thereby capturing pollen P in the air. With this structure, it is possible to provide a dust reducing apparatus capable of reliably eliminating dust such as pollen existing in the passenger compartment within a short time.