A powder transport unit for transporting powders includes a transport
pipe, a powder transport member, and a regulating member. The transport
pipe is curvingly extended. The powder transport member is disposed in an
entire length of the transport pipe and rotates in the transport pipe to
transport the powders. The regulating member is integrally formed with
the transport pipe at a downstream end of the transport pipe, and
regulates a length of the powder transport member disposed in the entire
length of the transport pipe. The regulating member includes an exit hole
to pass through the powders transported by the powder transport member in
the transport pipe.