2004 in men's road cycling is about the 2004 men's bicycle races governed by the UCI.
The World Road championships were held in Verona, Italy.
| Race | Date | Winner | Second | Third | |
|---|---|---|---|---|---|
| World Championship Road Race | Oct 3 | ||||
| World Championship Time Trial | Sep 29 |
| Race | Date | Winner | Second | Third | |
|---|---|---|---|---|---|
 Giro d'Italia | May 8 - May 30 | ||||
 Tour de France | Jul 3 - Jul 25 | ||||
 Vuelta a España | Sep 4 - Sep 26 |
| Race | Date | Winner | Second | Third | |
|---|---|---|---|---|---|
| Milan–San Remo | March 3 | ||||
 Tour of Flanders / Tour des Flandres | April 4 | ||||
| Paris–Roubaix | April 11 | ||||
 Amstel Gold Race | Apr 18 | ||||
| Liège–Bastogne–Liège | Apr 25 | ||||
 HEW Cyclassics Cup-Hamburg | Aug 1 | ||||
| Clásica de San Sebastián | Aug 7 | ||||
 Züri-Metzgete | Aug 22 | ||||
| Paris–Tours | Oct 10 | ||||
| Giro di Lombardia | Oct 10 |
The prefix 2 indicates that these events are stage races.
| Race | Date | Winner | Second | Third | |
|---|---|---|---|---|---|
| Paris–Nice | Mar 7 - Mar 14 | ||||
| Tirreno–Adriatico | Mar 10 - Mar 16 | ||||
| Tour of the Basque Country | Apr 5 – Apr 9 | ||||
| Tour de Romandie | Apr 27 – May 2 | ||||
| Critérium du Dauphiné Libéré | Jun 6 – Jun 13 | ||||
| Tour de Suisse | Jun 12 - Jun 20 | ||||
| Volta a Catalunya | Jun 14 - Jun 20 |
The prefix 1 indicates that these events are one-day races.
| Race | Date | Winner | Second | Third | |
|---|---|---|---|---|---|
| Gent–Wevelgem | Apr 7 | ||||
| La Flèche Wallonne | Apr 21 | ||||
| GP Ouest France-Plouay | Aug 29 | ||||
| Giro del Lazio | Sep 18 |
The prefix 2 indicates that these events are stage races.
| Race | Date | Winner | Second | Third | |
|---|---|---|---|---|---|
| Setmana Catalana de Ciclisme | Mar 22 - Mar 26 | ||||
| Critérium International | Mar 27 - Mar 28 | ||||
| Four Days of Dunkirk | May 5 - May 9 | ||||
| Tour du Languedoc-Roussillon | May 19 – May 23 | ||||
| Euskal Bizikleta | June 2 – Jun 6 | ||||
| Vuelta a Burgos | Aug 2 - Aug 5 | ||||
| Ronde van Nederland | Aug 24 - Aug 28 |
The prefix 1 indicates that these events are one-day races.
| Race | Date | Winner | Second | Third | |
|---|---|---|---|---|---|
| Omloop Het Volk | Feb 28 | race was cancelled due to bad weather | |||
| E3 Prijs Vlaanderen | Mar 27 | ||||
| Scheldeprijs | Apr 14 | ||||
| Rund um den Henninger Turm | May 1 | ||||
| Classique des Alpes | Jun 6 | ||||
| Tre Valli Varesine | Aug 17 | ||||
| Grand Prix of Aargau Canton | Aug 29 | ||||
| Giro del Veneto | Aug 21 | ||||
| Coppa Placci | Sep 4 | ||||
| Paris–Brussels | Sep 11 | ||||
| Grand Prix de Fourmies | Sep 12 | ||||
| Grand Prix des Nations | Sep 19 | ||||
| Giro dell'Emilia | Sep 25 | ||||
| Milano–Torino | Oct 13 | ||||
| Giro del Piemonte | Oct 14 |