2003–04 EHF Champions League
| 2003–04 | |
| Tournament information | |
|---|---|
| Sport | Handball |
| Dates | 12 September 2003–24 April 2004 |
| Administrator | EHF |
| Participants | 37 |
| Final positions | |
| Champions | RK Celje |
| Runner-up | SG Flensburg-Handewitt |
| Tournament statistics | |
| Top scorer(s) | Siarhei Rutenka (95) |
The 2003–04 EHF Champions League was the 44th edition of Europe's premier club handball tournament. Montpellier Handball were the reigning champions. RK Celje won their first ever title, beating SG Flensburg-Handewitt in the final. This was the first time a Slovenian team won the tournament.