The Third-Floor Corridor, known as the Forbidden Corridor in Harry Potter and the Philosopher's Stone, is a corridor on Hogwarts' third floor. At the start of the year, students are warned to stay away from it if they do not wish to die a most painful death. The Charms Corridor leads to this corridor.


The Third-Floor corridor hides a trapdoor leading to the Underground Chambers, guarded by Fluffy. Harry, Ron, Hermione and Neville first visit the corridor during Harry Potter and the Philosopher's Stone, when they are running from Filch.[1]

Harry, Ron and Hermione later re-visit the corridor to go down the trapdoor in an attempt to thwart Voldemort's attempt to get the Philosopher's Stone.[2]

From the Story

Discovered in Harry Potter and the Philosopher's Stone

The Midnight Duel, "The Forbidden Corridor"[3]

The third-floor corridor is out of bounds to students during Harry's first year. Dumbledore warns that anyone who does not wish to die a painful deth ought to stay away. This is where Fluffy, the three-headed dog, guards the entrance to the underground chambers protecting the Philosopher's Stone.


  1. The Midnight Duel
  2. Through the Trapdoor
  3. Third-floor corridor (as of Harry Potter and the Philosopher's Stone, Chapter 9) on Pottermore

See also

Community content is available under CC-BY-SA unless otherwise noted.