2004 Six Nations Championship squads
Head Coach: Clive Woodward
- Neil Back
 - Iain Balshaw
 - Olly Barkley
 - Steve Borthwick
 - Mike Catt
 - Ben Cohen
 - Martin Corry
 - Lawrence Dallaglio (c.)
 - Matt Dawson
 - Andy Gomarsall
 - Paul Grayson
 - Will Greenwood
 - Danny Grewcock
 - Richard Hill
 - Chris Jones
 - Ben Kay
 - Jason Leonard
 - Josh Lewsey
 - Henry Paul
 - Mark Regan
 - Jason Robinson
 - Alex Sanderson
 - Simon Shaw
 - James Simpson-Daniel
 - Matt Stevens
 - Steve Thompson
 - Mike Tindall
 - Phil Vickery
 - Julian White
 - Trevor Woodman
 - Joe Worsley
 
Head Coach: Bernard Laporte
- David Auradou
 - Serge Betsen
 - Julien Bonnaire
 - Yannick Bru
 - Nicolas Brusque
 - Vincent Clerc
 - Jean-Jacques Crenca
 - Pieter de Villiers
 - Christophe Dominici
 - Pépito Elhorga
 - Jean-Baptiste Élissalde
 - Imanol Harinordoquy
 - Cédric Heymans
 - Yannick Jauzion
 - Brian Liebenberg
 - Thomas Lièvremont
 - Olivier Magne
 - Sylvain Marconnet
 - Frédéric Michalak
 - Pierre Mignoni
 - Pascal Papé
 - Fabien Pelous (c)
 - Julien Peyrelongue
 - Clément Poitrenaud
 - Aurélien Rougerie
 - William Servat
 - Damien Traille
 - Dimitri Yachvili
 
Head Coach: Eddie O'Sullivan
Note: Flags indicate national union for the club/province as defined by World Rugby.
*captain in the first game
Head Coach: John Kirwan
- Mario Savi
 - Mirco Bergamasco
 - Marco Bortolami
 - Gonzalo Canale
 - Martin Castrogiovanni
 - Carlo Checchinato
 - Alessandro Troncon (c.)
 - Fabio Staibano
 - Roland de Marigny
 - Andrea De Rossi
 - Carlo Del Fava
 - Santiago Dellapè
 - Carlo Festuccia
 - Paul Griffen
 - Andrea Lo Cicero
 - Roberto Mandelli
 - Andrea Masi
 - Ezio Galon
 - Fabio Ongaro
 - Silvio Orlando
 - Kaine Robertson
 - Sergio Parisse
 - Aaron Persico
 - Salvatore Perugini
 - Pietro Travagli
 - Cristian Stoica
 - Rima Wakarua
 
Head Coach: Matt Williams
- Mike Blair
 - Gordon Bulloch
 - Chris Cusiter
 - Simon Danielli
 - Bruce Douglas
 - Stuart Grimes
 - Andrew Henderson
 - Nathan Hines
 - Ben Hinshelwood
 - Ally Hogg
 - Allan Jacobsen
 - Gavin Kerr
 - Brendan Laney
 - Derrick Lee
 - Cameron Mather
 - Scott Murray
 - Dan Parks
 - Chris Paterson (c.)
 - Jon Petrie
 - Tom Philip
 - Robbie Russell
 - Tom Smith
 - Simon Taylor
 - Simon Webster
 - Jason White
 
Head Coach: Steve Hansen
- Huw Bennett
 - Colin Charvis (c.)
 - Brent Cockbain
 - Gareth Cooper
 - Mefin Davies
 - Ben Evans
 - Iestyn Harris
 - Gethin Jenkins
 - Adam Jones
 - Dafydd Jones
 - Duncan Jones
 - Stephen Jones
 - Gareth Llewellyn
 - Robin McBryde
 - Michael Owen
 - Sonny Parker
 - Dwayne Peel
 - Alix Popham
 - Jamie Robinson
 - Tom Shanklin
 - Robert Sidoli
 - Ceri Sweeney
 - Mark Taylor
 - Gareth Thomas
 - Iestyn Thomas
 - Jonathan Thomas
 - Martyn Williams (c.)*
 - Rhys Williams
 - Shane Williams
 
*captain in the second game