The Zangger Committee (named after its first chairman, Professor Claude Zangger) is an informal group of nuclear supplier countries which are states parties to the Nuclear Non-Proliferation Treaty (NPT). The Committee was set up in 1971 with the purpose of agreeing on the detailed implementation of Article III.2 of the NPT. This article reads as follows;

"Each State Party to the Treaty undertakes not to provide (a) source or special fissionable material, or (b) equipment or material especially designed or prepared for the processing use or production of special fissionable material, to any non-nuclear weapon state (NNWS) for peaceful purposes, unless the source or special fissionable material shall be subject to the safeguards required by this article."

The resulting understandings, reached in 1974 and published in the form of Memoranda by the International Atomic Energy Agency (IAEA) as in the INFCIRC/209 series, set common conditions on which exporting parties would insist before exporting defined material to NNWS not party to the NPT. The list of goods to which these understandings apply is also published in INFCIRC/209 series, and has been updated several times.

The UK was a founder member of the Zangger Committee, and through the UK mission in Vienna acts as Secretariat to the Committee. Austria currently holds the Chair of the Committee.

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