| Prevseason Year: | 2002–03 |
| Finals Champ: | Oulun Kärpät |
| Finals Runner-Up: | HC TPS |
| Seasonslist: | List of SM-liiga seasons |
| Seasonslistnames: | SM-liiga |
| Prevseason Link: | 2002–03 SM-liiga season |
| Nextseason Link: | 2004–05 SM-liiga season |
| Nextseason Year: | 2004–05 |
The 2003–04 SM-liiga season was the 29th season of the SM-liiga, the top level of ice hockey in Finland. 13 teams participated in the league, and Kärpät Oulu won the championship.
| Rank | Team | GP | W | OTW | T | OTL | L | GF | GA | Diff | Pts | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1. | 56 | 30 | 5 | 7 | 3 | 11 | 169 | 112 | +57 | 80 | ||
| 2. | 56 | 29 | 6 | 4 | 4 | 13 | 194 | 129 | +65 | 78 | ||
| 3. | 56 | 30 | 3 | 5 | 1 | 17 | 181 | 142 | +39 | 72 | ||
| 4. | 56 | 27 | 3 | 7 | 2 | 17 | 162 | 122 | +40 | 69 | ||
| 5. | 56 | 24 | 3 | 8 | 3 | 18 | 154 | 127 | +27 | 65 | ||
| 6. | 56 | 24 | 5 | 3 | 4 | 20 | 159 | 148 | +11 | 65 | ||
| 7. | 56 | 23 | 4 | 7 | 3 | 19 | 131 | 120 | +11 | 64 | ||
| 8. | 56 | 24 | 2 | 2 | 5 | 23 | 158 | 145 | +13 | 59 | ||
| 9. | 56 | 18 | 5 | 7 | 3 | 23 | 134 | 139 | -5 | 56 | ||
| 10. | 56 | 18 | 2 | 7 | 5 | 24 | 138 | 166 | -28 | 52 | ||
| 11. | 56 | 17 | 4 | 5 | 3 | 27 | 140 | 186 | -46 | 50 | ||
| 12. | 56 | 11 | 2 | 5 | 5 | 27 | 127 | 194 | -67 | 36 | ||
| 13. | Pelicans | 56 | 7 | 1 | 7 | 4 | 37 | 110 | 227 | -117 | 27 |