A vehicle air-conditioning apparatus includes: a duct disposed in a seat of a vehicle, air flowing through the duct from an air conditioning unit; a rear seat outlet formed on a back face of a backrest portion of the seat to blow out the air from the duct toward a rear seat of the vehicle; and an air flow deflection member that partitions the rear seat outlet into a first region and a second region to define a first passage through which the air flows from the duct through the first region in a first direction in a vehicle cabin and a second passage through which the air flows from the duct through the second region in a second direction more downward than the first direction in the vehicle cabin.