The Slytherin common room password was not one fixed password; it changed regularly. In Harry Potter and the Chamber of Secrets , the password used when Harry and Ron got in was “Pure-blood”.

Quick Scoop

  • The password changed every fortnight and was posted on the noticeboard.
  • Another recorded password was “Aspiration” at the start of the 1890–1891 school year.
  • The official Harry Potter encyclopedia confirms the common room required a password for entry, though it does not list one permanent password.

A simple example: if someone asks for “the” Slytherin password, the most famous answer is Pure-blood , but the accurate answer is that it varied over time.

TL;DR: Pure-blood is the best-known one, but Slytherin passwords changed regularly.