In a vehicle air conditioner, a rotary door is disposed to open and close a foot opening portion and an inlet port of a face opening portion and a defroster opening portion. The rotary door includes a curvature outer peripheral portion for opening and closing the inlet port of the face opening portion and the foot opening portion, end plate portions located at two ends of the outer peripheral portion in an axial direction to open and close the foot opening portion, and shaft portions located at the end plate portions to be rotatably supported in the air conditioning case. The rotary door and the air conditioning case are provided such that a clearance between the inner wall of the air conditioning case and the outer peripheral portion of the rotary door is changed to be different between a bi-level air outlet mode and a foot/defroster air outlet mode.