In a vehicular air conditioning apparatus, a first blower unit is connected by a connection duct to a side of a casing constituted by respective air passages. On a lower portion of the casing, a second blower unit different from the first blower unit is connected. A center plate is disposed centrally in a lateral direction of the casing. Air is supplied from the first blower unit to the interior of the casing, whereby cool air cooled by an evaporator and warm air heated by a heater core are mixed together and blown respectively and separately to a driver's seat side and a passenger seat side of the front seats. Also, Air supplied from the second blower unit to the interior of the casing, after being adjusted to a predetermined temperature in the evaporator and the heater core, is supplied to a rear seat side of the vehicle.