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

Liberty Seguros LST	Comunidad Valenciana–Kelme KEL	Ag2r Prévoyance A2R
1 Roberto Heras 2 Isidro Nozal 3 René Andrle 4 Giampaolo Caruso 5 Koldo Gil 6 Igor G. de Galdeano 7 Jan Hruška 8 Marcos Serrano 9 Dariusz Baranowski Sports directors: Manuel Saiz and Marino Lejarreta	11 Alejandro Valverde 12 David Blanco 13 Francisco Cabello 14 Carlos García Quesada 15 Eladio Jiménez 16 José Juliá 17 David Latasa 18 Javier Pascual Rodríguez 19 Rubén Plaza Sports directors: Vicente Belda and José Ignacio Labarta	21 Mikel Astarloza 22 Stéphane Bergès 23 Íñigo Chaurreau 24 Andy Flickinger 25 Stéphane Goubert 26 Nicolas Inaudi 27 Christophe Oriol 28 Erki Pütsep 29 Julien Laidoun Sports directors: Laurent Biondi and Artūras Kasputis
Alessio–Bianchi ALS	Cafés Baqué BAQ	Cofidis– Le Crédit par Téléphone COF
31 Pietro Caucchioli 32 Angelo Furlan 33 Martin Hvastija 34 Ruslan Ivanov 35 Vladimir Miholjević 36 Claus Michael Møller 37 Cristian Moreni 38 Ellis Rastelli 39 Scott Sunderland Sports director: Dario Mariuzzo	41 Félix Cárdenas 42 Pedro Arreitunandía 43 Hernán Buenahora 44 Francisco Tomás García 45 Heberth Gutiérrez 46 Iván Parra 47 David Plaza 48 Aitor Pérez Arrieta 49 Ricardo Serrano Sports director: Jon Cengotitabengoa	51 Daniel Atienza 52 Íñigo Cuesta 53 Bingen Fernández 54 Stuart O'Grady 55 Luis Pérez 56 Arnaud Coyot 57 Guido Trentin 58 Cédric Vasseur 59 Matthew White Sports directors: Francis van Londersele and Benard Quillen
Euskaltel–Euskadi EUS	Fassa Bortolo FAS	Illes Balears–Banesto IBB
61 Haimar Zubeldia 62 Joseba Albizu 63 Mikel Artetxe 64 Iñaki Isasi 65 Roberto Laiseka 66 Alberto López de Munain 67 Samuel Sánchez 68 Aitor Silloniz 69 Josu Silloniz Sports directors: Julián Gorospe and Miguel Madariaga	71 Aitor González 72 Alessandro Petacchi 73 Dario Cioni 74 Guido Trenti 75 Julián Sánchez Pimienta 76 Fabio Sacchi 77 Volodymyr Hustov 78 Alberto Ongarato 79 Marco Velo Sports directors: Alessandro Giannelli and Alberto Volpi	81 Francisco Mancebo 82 Denis Menchov 83 José Luis Arrieta 84 Antonio Colóm 85 José Vicente García Acosta 86 Joan Horrach 87 Pablo Lastras 88 Unai Osa 89 Mikel Pradera Sports directors: Eusebio Unzué and José Luis Jaimerena
Lampre LAM	Costa de Almería–Paternina ALM	Phonak Hearing System PHO
91 Francesco Casagrande (*) 92 Igor Astarloa 93 Simone Bertoletti 94 Alessandro Cortinovis 95 Juan Manuel Gárate 96 Mariano Piccoli 97 Manuel Quinziato 98 Michele Scotto 99 Daniele Righi Sports directors: Fabrizio Bontempi and Mauricio Piovani	101 Ion del Río 102 David Fernández 103 Carlos R. Golbano (*) 104 Jorge Ferrío 105 José Ángel Gómez Marchante 106 Francisco José Lara 107 David Herrero 108 Joaquín López 109 Carlos Torrent Sports directors: Miguel Moreno and Juan Martínez Oliver	111 Óscar Sevilla 112 Tyler Hamilton 113 Gonzalo Bayarri 114 Santos González 115 Bert Grabsch 116 José Enrique Gutiérrez 117 Nicolas Jalabert 118 Santiago Pérez 119 Tadej Valjavec Sports directors: Álvaro Pino and Jacques Michaud
Quick Step–Davitamon QSD	Rabobank RAB	Colchón Relax–Bodysol REB
121 José A. Pecharromán 122 László Bodrogi 123 José Garrido 124 Pedro Horrillo 125 Kevin Hulsmans 126 Luca Paolini 127 Patrik Sinkewitz 128 Bram Tankink 129 Jurgen Van Goolen Sports directors: Wilfried Peeters and Serge Parsani	131 Óscar Freire 132 Jan Boven 133 Kevin De Weert 134 Maarten den Bakker 135 Robert Hunter 136 Ronald Mutsaars 137 Joost Posthuma 138 Pieter Weening 139 Thorwald Veneberg Sports directors: Erik Breukink and Frans Maassen	141 José Alberto Martínez 142 José Miguel Elías 143 Xavier Florencio 144 Josep Jufré 145 Nácor Burgos 146 Luis Pasamontes 147 José Luis Rebollo 148 Bert Roesems 149 Johan van Summeren Sports directors: José María Pérez and Jesús Suárez Cueva
Saeco SAE	Saunier Duval–Prodir SDV	Team CSC CSC
151 Damiano Cunego 152 Danilo Di Luca 153 Paolo Fornaciari 154 Juan Fuentes 155 Marius Sabaliauskas 156 Giosuè Bonomi 157 Eddy Mazzoleni 158 Alessandro Spezialetti 159 Sylwester Szymyd Sports directors: Giuseppe Martinelli and Guido Bontempi	161 Joseba Beloki 162 David Cañada 163 Rafael Casero 164 Juan Carlos Domínguez 165 Fabian Jeker 166 M.A. Martín Perdiguero 167 Leonardo Piepoli 168 Joaquim Rodríguez 169 Constantino Zaballa Sports directors: Vittorio Algeri and Matteo Algeri	171 Carlos Sastre 172 Thomas Bruun Eriksen 173 Manuel Calvente 174 Vladimir Gusev 175 Jörg Jaksche 176 Peter Luttenberger 177 Frank Høj 178 Fränk Schleck 179 Brian Vandborg Sports directors: Johnny Weltz and Sean Yates
T-Mobile Team TMO	US Postal Service–Berry Floor USP	Vini Caldirola– Nobili Rubinetterie VIN
181 Alexander Vinokourov 182 Santiago Botero 183 Cadel Evans 184 Torsten Hiekmann 185 Andreas Klier 186 Tomáš Konečný 187 Stephan Schreck 188 Steffen Wesemann 189 Erik Zabel Sports directors: Mario Kummer and Giovanni Fidanza	191 Michael Barry 192 Manuel Beltrán 193 Benoît Joachim 194 Floyd Landis 195 Guennadi Mikhailov 196 Víctor Hugo Peña 197 Antonio Cruz 198 Max van Heeswijk 199 David Zabriskie Sports directors: Johan Bruyneel and Dirk Demol	201 Stefano Garzelli 202 Dario Andriotto 203 Patrick Calcagni 204 Mauro Gerosa 205 Marco Milesi 206 Roberto Sgambelluri 207 Marco Zanotti 208 Pavel Tonkov 209 Steve Zampieri Sports directors: Paolo Dotti and Valerio Tebaldi

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