Sheet manufacturing apparatus

A sheet manufacturing apparatus comprising:

• a defibrating unit that defibrates a material to turn the material into fibers;
• a fiber piling-up unit that piles up the fibers to form a web;
• a pressing unit that presses the web to turn the web into a sheet;
• and
• a humidifying mechanism that supplies humidified air to the fiber piling-up unit, wherein
• the fiber piling-up unit includes
• a rotating portion that stirs the fibers supplied from the defibrating unit,
• a case in which the rotating portion is housed, and
• a transportation belt that is provided under the case and transports the web in a transportation direction,
• the web is formed on the transportation belt by piling up the fibers on the transportation belt, and
• the humidifying mechanism includes a nozzle that is provided upstream of the fiber piling-up unit in the transportation direction and supplies the humidified air to the fiber piling-up unit,
• the nozzle is disposed adjacent to a sidewall of the case upstream of the case in the transportation direction,
• the nozzle includes an opening portion having a rectangular shape, and
• a length of the opening portion in the transportation direction is less than a length of the opening portion in a direction intersecting with the transportation direction.