To notify a user of the user's approach to a guidance object with the user's own sense of smell.

Air including different kinds of smell is jetted out of supply ducts of different guidance objects. The air is collected in the outside through emission ducts. Odor in the air including smell emitted to the outside is cleaned through a filter, and the air is distributed after the quantity is adjusted by a plurality of flow controllers of a first group by each of the plurality of guidance objects. The air whose quantity is adjusted is given different smell by guidance object in a plurality of smell generators, and connected to the supply ducts. The air whose odor is cleaned through the filter, after the quantity is adjusted by a plurality of flow controllers of a second group, is mixed with the air to which smell is given by the smell generators. When the user advances along a passage and comes close to the guidance object, the user can sense the prescribed smell and know that the user has come close to the guidance object.