An air conditioning unit for a vehicle, comprising: an air conditioning case; a blower disposed in the air conditioning case; a cooler configured to cool the air flowing in the air conditioning case; and a heater configured to heat the air which has been cooled in the cooler, wherein: the air conditioning case includes an upper bypass passage through which the air blown out of the blower bypasses the heater on an upper side of the heater, a lower bypass passage through which the air bypasses the heater on a lower side of the heater, a first opening provided downstream of the upper bypass passage in the air flow direction, and a second opening provided downstream of the lower bypass passage in the air flow direction; characterized in that the cooler is disposed upstream of the blower in an air flow direction; the heater is disposed downstream of the blower in the air flow direction; the blower is configured to draw air from an opening provided on one end side of the blower in a rotation axis of the blower and blow the air radially outward from the rotation axis; the opening of the blower faces an air outflow face of the cooler; and the heater is disposed in the air conditioning case such that a passage area of the upper bypass passage is larger than a passage area of the lower bypass passage. an air conditioning case; a blower disposed in the air conditioning case; a cooler configured to cool the air flowing in the air conditioning case; and a heater configured to heat the air which has been cooled in the cooler, wherein: the air conditioning case includes an upper bypass passage through which the air blown out of the blower bypasses the heater on an upper side of the heater, a lower bypass passage through which the air bypasses the heater on a lower side of the heater, a first opening provided downstream of the upper bypass passage in the air flow direction, and a second opening provided downstream of the lower bypass passage in the air flow direction; characterized in that the cooler is disposed upstream of the blower in an air flow direction; the heater is disposed downstream of the blower in the air flow direction; the blower is configured to draw air from an opening provided on one end side of the blower in a rotation axis of the blower and blow the air radially outward from the rotation axis; the opening of the blower faces an air outflow face of the cooler; and the heater is disposed in the air conditioning case such that a passage area of the upper bypass passage is larger than a passage area of the lower bypass passage. the air conditioning case includes an upper bypass passage through which the air blown out of the blower bypasses the heater on an upper side of the heater, a lower bypass passage through which the air bypasses the heater on a lower side of the heater, a first opening provided downstream of the upper bypass passage in the air flow direction, and a second opening provided downstream of the lower bypass passage in the air flow direction; characterized in that the cooler is disposed upstream of the blower in an air flow direction; the heater is disposed downstream of the blower in the air flow direction; the blower is configured to draw air from an opening provided on one end side of the blower in a rotation axis of the blower and blow the air radially outward from the rotation axis; the opening of the blower faces an air outflow face of the cooler; and the heater is disposed in the air conditioning case such that a passage area of the upper bypass passage is larger than a passage area of the lower bypass passage.