2003–04 Mestis season

The 2003–04 Mestis season was the fourth season of the Mestis, the second level of ice hockey in Finland. 12 teams participated in the league, and KalPa won the championship.

Playoffs
Quarterfinals Semifinals Final 3rd place
 * Jukurit – K-Vantaa 3–2 on series
 * KooKoo – Sport 3–2 on series
 * KalPa – Salamat 3–0 on series
 * Hermes – Hokki 3–1 on series
 * Jukurit – KooKoo 3–0 on series
 * KalPa – Hermes 3–0 on series
 * KalPa – Jukurit 3–2 on series
 * KooKoo – Hermes 1–0 on series