AIR CONDITIONER FOR VEHICLE

Provided is a vehicle heating ventilation and air conditioning unit capable of improving the performance of a side demister in a foot mode where a DEF damper is set to a small degree of opening, and capable of securing window clearness of side window glass. In a vehicle heating ventilation and air conditioning unit (1) that is configured so as to selectively blow out an air flow whose temperature has been regulated by an evaporator (4) and a heater (5) mounted in an air channel (3) from a DEF blowing channel (17), a face blowing channel (16), and a foot blowing channel (18), which are at downstream of the evaporator (4) and the heater (5), into a cabin by opening and closing a DEF damper (8), a face damper (7), and a foot damper (9), side demister channels (31) that guide the temperature-regulated air to the side window glass are provided at both side portions of the DEF blowing channel (17), and baffle ribs (36) that guide the temperature-regulated air to the side demister channels (31) are provided in the vicinity of both end portions of the DEF damper (8) that opens and closes the DEF blowing channel (17) and the side demister channels (31) simultaneously.