A multistage steaming machine (200) is configured such that a steam chamber main body portion (2) in which steam is actually supplied to a group of noodle strings is provided with: a tunnel-shaped noodle introducing portion (1) extending from the steam chamber main body portion (2) in an obliquely downward direction； and a tunnel-shaped noodle discharging portion (3) similarly extending from the steam chamber main body portion (2) in an obliquely downward direction. A vertical position of an inlet end of the noodle introducing portion (1) and a vertical position of an outlet end of the noodle discharging portion (3) are lower than a vertical position of a lower end portion of the steam chamber main body portion (2).
