Abstract: In a vehicular air conditioner in which heat of recirculated air inputted by an indoor air blower, is exchanged by an indoor heat exchanger so as to be retransmitted to a vehicle, there are provided with a cyclone fan, which aspirates heavy fresh outside air including snow or the like, so as to mix the outside air with the recirculated air inputted by the indoor air blower, and a partition plate, which separates light air in which snow or the like is not included, and heavy air in which snow or the like is included, by centrifugal force of the cyclone fan at a blowoff outlet of the cyclone fan.