The House of Representatives shall chuse their Speaker and other Officers; and shall have the sole Power of Impeachment.
(Last paragraph of Section 2)
As pointed out further down thus thread, every Speaker so far has been a member, but the wording of the Constitution does not make that a prerequisite.
My understanding is that the Speaker of the House of Representatives does not need to be an elected Representative.
From Article 1, Section 2 of the Constitution:
The House of Representatives shall chuse their Speaker and other Officers; and shall have the sole Power of Impeachment.
(Last paragraph of Section 2)
As pointed out further down thus thread, every Speaker so far has been a member, but the wording of the Constitution does not make that a prerequisite.