In a vehicle air conditioner, when a passenger manually reduces an air blowing amount in a large blowing amount area of automatic control, a correction of the blower voltage control characteristic is changed in accordance with a condition capable of determining a passenger’s request. The body contact region is recessed with respect to a surface of the channel region to avoid shorting between a body contact and the sourcedrain regions. The pressing member has a tapered inner periphery which is mounted onto a tapered outer periphery of a pressing ring which is mounted to the steerer tube and rests on a top head set on a head tube.