Abstract: A vehicle air conditioning device (10; 10A; 10B) has a casing (20) configuring a temperature adjustment section (12; 12A; 12B). The casing (20) has provided in a position thereof opposed to an inflow surface (41) of a heat exchanger (40) a flow direction change section (30) which causes the flow direction of air led to the temperature adjustment section (12; 12A; 12B) from a duct section (13; 13A; 13B) to bend approximately 90 degrees and leads the air to the inflow surface (41). Guide portions (60, 70; 60A, 70A; 60B) smaller in area than the flow direction change section (30) as seen when directly facing the inflow surface (41) are provided in a heat exchanger upstream space (22) between the inner wall surface of the casing (20) and the inflow surface (41).