| 2017–18 SM-liiga | |
| League: | SM-Liiga |
| Sport: | Ice hockey |
| Duration: | September 2017 – April 2018 |
| No Of Teams: | 15 |
| Tv: | Nelonen |
| Season: | Regular season |
| Season Champs: | Oulun Kärpät |
| Season Champ Name: | Best record |
| Second Place: | TPS |
| Mvp: | Julius Junttila (Kärpät) |
| Mvp Link: | Lasse Oksanen trophy |
| Top Scorer: | Antti Suomela (JYP) |
| Top Scorer Link: | Veli-Pekka Ketola trophy |
| Playoffs: | Playoffs |
| Playoffs Link: | Jari Kurri Trophy |
| Playoffs Mvp: | Julius Junttila (Kärpät) |
| Playoffs Mvp Link: | Jari Kurri Trophy |
| Finals Champ: | Oulun Kärpät |
| Finals Runner-Up: | Tappara |
| Seasonslist: | List of SM-liiga seasons |
| Seasonslistnames: | SM-liiga |
| Prevseason Link: | 2016–17 SM-liiga season |
| Prevseason Year: | 2016–17 |
| Nextseason Link: | 2018–19 SM-liiga season |
| Nextseason Year: | 2018–19 |
The 2017–18 SM-liiga season was the 43rd season of the SM-liiga (branded simply as "Liiga"), the top level of ice hockey in Finland, since the league's formation in 1975. Tappara was the season as a defending champion. This season included a record number of matches played on Fridays and Saturdays. In autumn, there was a national team break from 5 November until 13 November.
The specialties of the season included, for the first time in SM-liiga history, double games between KooKoo and Vaasan Sport. Teams met twice in October in consecutive evenings in Kouvola and in February twice in succession in Vaasa. In December, HIFK and Kärpät met in the hockey outdoor show at Kaisaniemi, Helsinki.
In 2018, the SM-liiga continued on Wednesday, 3 January. Ice hockey at the 2018 Winter Olympics in South Korea's Pyeongchang start with the Finland men's national ice hockey team on February 14, 2018. In SM-liiga, a full round was played on Saturday 17 February, after which the Olympic Games started. Liiga games resumed on Tuesday, February 27.
Kärpät won the championship by winning Tappara in the final series 4–2.
Top six advance straight to quarter-finals, while teams between 7th and 10th positions play wild card round for the final two spots. The SM-liiga is a closed series and thus there is no relegation.
Rules for classification: 1) Points; 2) 3-point wins 3) Goal difference; 4) Goals scored; 5) Head-to-head points.[1]
Kärpät wins the series 4-2 and wins the championship.
| Kärpät | ||
| Tappara | ||
| HIFK | ||
| 4 | TPS | |
| 5 | JYP | |
| 6 | KalPa | |
| 7 | SaiPa | |
| 8 | Ässät | |
| 9 | Lukko | |
| 10 | Pelicans | |
| 11 | Ilves | |
| 12 | HPK | |
| 13 | Jukurit | |
| 14 | KooKoo | |
| 15 | Sport |