This is a list of teams and cyclists for the 2004 Vuelta a España.

Liberty Seguros LSTComunidad Valenciana–Kelme KELAg2r Prévoyance A2R1Roberto Heras2Isidro Nozal3René Andrle4Giampaolo Caruso5Koldo Gil6Igor G. de Galdeano7Jan Hruška8Marcos Serrano9Dariusz BaranowskiSports directors:Manuel Saiz and Marino Lejarreta11Alejandro Valverde12David Blanco13Francisco Cabello14Carlos García Quesada15Eladio Jiménez16José Juliá17David Latasa18Javier Pascual Rodríguez19Rubén PlazaSports directors:Vicente Belda and José Ignacio Labarta21Mikel Astarloza22Stéphane Bergès23Íñigo Chaurreau24Andy Flickinger25Stéphane Goubert26Nicolas Inaudi27Christophe Oriol28Erki Pütsep29Julien LaidounSports directors:Laurent Biondi and Artūras KasputisAlessio–Bianchi ALSCafés Baqué BAQCofidis–Le Crédit par Téléphone COF31Pietro Caucchioli32Angelo Furlan33Martin Hvastija34Ruslan Ivanov35Vladimir Miholjević36Claus Michael Møller37Cristian Moreni38Ellis Rastelli39Scott SunderlandSports director:Dario Mariuzzo41Félix Cárdenas42Pedro Arreitunandía43Hernán Buenahora44Francisco Tomás García45Heberth Gutiérrez46Iván Parra47David Plaza48Aitor Pérez Arrieta49Ricardo SerranoSports director:Jon Cengotitabengoa51Daniel Atienza52Íñigo Cuesta53Bingen Fernández54Stuart O'Grady55Luis Pérez56Arnaud Coyot57Guido Trentin58Cédric Vasseur59Matthew WhiteSports directors:Francis van Londersele and Benard QuillenEuskaltel–Euskadi EUS FASIlles Balears–Banesto IBB61Haimar Zubeldia62Joseba Albizu63Mikel Artetxe64Iñaki Isasi65Roberto Laiseka66Alberto López de Munain67Samuel Sánchez68Aitor Silloniz69Josu SillonizSports directors:Julián Gorospe and Miguel Madariaga71Aitor González72Alessandro Petacchi73Dario Cioni74Guido Trenti75Julián Sánchez Pimienta76Fabio Sacchi77Volodymyr Hustov78Alberto Ongarato79Marco VeloSports directors:Alessandro Giannelli and Alberto Volpi81Francisco Mancebo82Denis Menchov83José Luis Arrieta84Antonio Colóm85José Vicente García Acosta86Joan Horrach87Pablo Lastras88Unai Osa89Mikel PraderaSports directors:Eusebio Unzué and José Luis JaimerenaLampre LAM ALMPhonak Hearing System PHO91Francesco Casagrande (*)92Igor Astarloa93Simone Bertoletti94Alessandro Cortinovis95Juan Manuel Gárate96Mariano Piccoli97Manuel Quinziato98Michele Scotto99Daniele RighiSports directors:Fabrizio Bontempi and Mauricio Piovani101Ion del Río102David Fernández103Carlos R. Golbano (*)104Jorge Ferrío105José Ángel Gómez Marchante106Francisco José Lara107David Herrero108Joaquín López109Carlos TorrentSports directors:Miguel Moreno and Juan Martínez Oliver111Óscar Sevilla112Tyler Hamilton113Gonzalo Bayarri114Santos González115Bert Grabsch116José Enrique Gutiérrez117Nicolas Jalabert118Santiago Pérez119Tadej ValjavecSports directors:Álvaro Pino and Jacques MichaudQuick Step–Davitamon QSDRabobank RABColchón Relax–Bodysol REB121José A. Pecharromán122László Bodrogi123José Garrido124Pedro Horrillo125Kevin Hulsmans126Luca Paolini127Patrik Sinkewitz128Bram Tankink129Jurgen Van GoolenSports directors:Wilfried Peeters and Serge Parsani131Óscar Freire132Jan Boven133Kevin De Weert134Maarten den Bakker135Robert Hunter136Ronald Mutsaars137Joost Posthuma138Pieter Weening139Thorwald VenebergSports directors:Erik Breukink and Frans Maassen141José Alberto Martínez142José Miguel Elías143Xavier Florencio144Josep Jufré145Nácor Burgos146Luis Pasamontes147José Luis Rebollo148Bert Roesems149Johan van SummerenSports directors:José María Pérez and Jesús Suárez Cueva SAESaunier Duval–Prodir SDVTeam CSC CSC151Damiano Cunego152Danilo Di Luca153Paolo Fornaciari154Juan Fuentes155Marius Sabaliauskas156Giosuè Bonomi157Eddy Mazzoleni158Alessandro Spezialetti159Sylwester SzymydSports directors:Giuseppe Martinelli and Guido Bontempi161Joseba Beloki162David Cañada163Rafael Casero164Juan Carlos Domínguez165Fabian Jeker166M.A. Martín Perdiguero167Leonardo Piepoli168Joaquim Rodríguez169Constantino ZaballaSports directors:Vittorio Algeri and Matteo Algeri171Carlos Sastre172Thomas Bruun Eriksen173Manuel Calvente174Vladimir Gusev175Jörg Jaksche176Peter Luttenberger177Frank Høj178Fränk Schleck179Brian VandborgSports directors:Johnny Weltz and Sean YatesT-Mobile Team TMOUS Postal Service–Berry Floor USPVini Caldirola–Nobili Rubinetterie VIN181Alexander Vinokourov182Santiago Botero183Cadel Evans184Torsten Hiekmann185Andreas Klier186Tomáš Konečný187Stephan Schreck188Steffen Wesemann189Erik ZabelSports directors:Mario Kummer and Giovanni Fidanza191Michael Barry192Manuel Beltrán193Benoît Joachim194Floyd Landis195Guennadi Mikhailov196Víctor Hugo Peña197Antonio Cruz198Max van Heeswijk199David ZabriskieSports directors:Johan Bruyneel and Dirk Demol201Stefano Garzelli202Dario Andriotto203Patrick Calcagni204Mauro Gerosa205Marco Milesi206Roberto Sgambelluri207Marco Zanotti208Pavel Tonkov209Steve ZampieriSports directors:Paolo Dotti and Valerio Tebaldi

(*) Declared not fit to start before the Tour.