The 2003–04 Slovenian Ice Hockey League season was the 13th season of the Slovenian Ice Hockey League. Seven teams participated in the league, and Olimpija won the league championships.
| Club | GP | W | T | L | GF | GA | +/– | Pts | ||
|---|---|---|---|---|---|---|---|---|---|---|
| Group A | ||||||||||
| 1 | Slavija | 8 | 6 | 1 | 1 | 36 | 20 | +16 | 13 (3) | |
| 2 | Olimpija | 8 | 6 | 0 | 2 | 41 | 15 | +26 | 12 (2) | |
| 3 | Jesenice | 8 | 5 | 1 | 2 | 26 | 15 | +11 | 11 (1) | |
| Group B | ||||||||||
| 4 | Kranjska Gora | 15 | 8 | 1 | 6 | 50 | 51 | –1 | 17 (1) | |
| 5 | Triglav Kranj | 15 | 6 | 3 | 6 | 41 | 56 | –15 | 15 (3) | |
| 6 | Maribor | 15 | 6 | 2 | 7 | 53 | 41 | +12 | 14 (2) | |
| 7 | Tivoli | 15 | 0 | 2 | 13 | 32 | 81 | –49 | 2 (1) | |
| Club | GP | W | T | L | GF | GA | +/– | Pts | ||
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Olimpija | 6 | 4 | 1 | 1 | 28 | 17 | +11 | 11 (2) | |
| 2 | Slavija | 6 | 2 | 3 | 1 | 18 | 15 | +3 | 10 (3) | |
| 3 | Jesenice | 6 | 4 | 2 | 1 | 23 | 14 | +9 | 9 (1) | |
| 4 | Kranjska Gora | 6 | 0 | 0 | 6 | 10 | 33 | –23 | 1 (1) |