| Tournament information | |
|---|---|
| Dates | 15–25 January 2004 |
| Venue | Welsh Institute of Sport |
| City | Cardiff |
| Country | Wales |
| Organisation | WPBSA |
| Format | Ranking event |
| Total prize fund | £450,000[1] |
| Winner's share | £52,000[1] |
| Highest break |  Ronnie O'Sullivan (ENG) (139) |
| Final | |
| Champion | Ronnie O'Sullivan (ENG) |
| Runner-up | Steve Davis (ENG) |
| Score | 9–8 |
← 2003 2005 → | |
The 2004 Welsh Open was a professional ranking snooker tournament that took place between 15 and 25 January at the Welsh Institute of Sport in Cardiff, Wales.
Stephen Hendry was the defending champion, but he lost in the quarter-finals 4–5 against Marco Fu.
Ronnie O'Sullivan recovered from 5–8 down to defeat Steve Davis 9–8 in the final. This was O'Sullivan's 14th ranking title of his career.