A vehicle air conditioning device has an air-conditioning unit (2 or 3) including a temperature regulation unit (3) having an evaporator (1) and a blower unit (2) including a blower (5). The blower unit (2) is offset to a side of the temperature regulation unit (3). A deflection guide (7) to deflect a flow of air is provided upstream of the evaporator in a flow of air flowing into an inflow plane (1a) of the evaporator from the blower. The deflection guide has a plate-like defection portion (71) inclined with respect to the inflow plane, and a support portion (72) supporting the deflection portion by extending from the blower unit. A gap (G1) is provided between the support portion and the evaporator. Air that has collided with the deflection portion is changed in flow direction to head for the blower side of the inflow plane. Air thus flows more to the blower side of the inflow plane. Consequently, a vehicle air conditioning device having a duct structure to flow air between the blower and the evaporator is provided, which duct structure has low fluid resistance and is relatively easy to manufacture because no complex structure is involved.