| Prevseason Year: | 2003–04 |
| Finals Champ: | Oulun Kärpät |
| Finals Runner-Up: | Jokerit |
| Seasonslist: | List of SM-liiga seasons |
| Seasonslistnames: | SM-liiga |
| Prevseason Link: | 2003–04 SM-liiga season |
| Nextseason Link: | 2005–06 SM-liiga season |
| Nextseason Year: | 2005–06 |
The 2004–05 SM-liiga season was the 30th 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.
| Team | GP | W | OTW | OTL | L | GF | GA | Diff | Pts | ||
| 1 | 56 | 35 | 5 | 6 | 10 | 190 | 122 | +68 | 121 | ||
| 2 | 56 | 34 | 4 | 3 | 15 | 163 | 96 | +67 | 113 | ||
| 3 | 56 | 24 | 17 | 2 | 13 | 196 | 128 | +68 | 108 | ||
| 4 | 56 | 29 | 5 | 7 | 15 | 162 | 116 | +46 | 102 | ||
| 5 | 56 | 28 | 4 | 6 | 18 | 152 | 130 | +22 | 98 | ||
| 6 | 56 | 22 | 8 | 10 | 16 | 146 | 142 | +4 | 92 | ||
| 7 | 56 | 22 | 6 | 8 | 20 | 164 | 179 | -15 | 86 | ||
| 8 | 56 | 23 | 2 | 7 | 24 | 147 | 148 | -1 | 80 | ||
| 9 | 56 | 17 | 8 | 6 | 25 | 151 | 172 | -21 | 73 | ||
| 10 | 56 | 15 | 8 | 6 | 27 | 140 | 178 | -38 | 67 | ||
| 11 | 56 | 15 | 5 | 6 | 30 | 139 | 159 | -20 | 61 | ||
| 12 | 56 | 11 | 7 | 5 | 33 | 145 | 195 | -50 | 52 | ||
| 13 | 56 | 7 | 3 | 10 | 36 | 100 | 230 | -130 | 37 |