AIR INTAKE DUCT

An air intake duct is configured to suitably supply air inside a passenger compartment of a vehicle as a cooling air to a battery unit mounted below a floor carpet in the vehicle. The air intake duct includes an intake grille and a protrusion. The intake grille has a plurality of intake holes. The intake grille is disposed in a horizontal direction at substantially a same height as the floor carpet. The protrusion protrudes from the intake grille toward the passenger compartment.