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.