^Jokerit Helsinki withdrew from the Veikkausliiga and the relegation of KooTeePee Kotka was cancelled. KooTeePee's fixtures in Ykkönen were inherited by GBK Kokkola, the highest placed relegated team in 2003.[1]
Promotion play-offs
Jazz Pori as 13th placed team in the 2004 Veikkausliiga and MIFK Mariehamn as runners-up of the 2004 Ykkönen competed in a two-legged play-off for a place in the Veikkausliiga. MIFK won the play-offs 3-2 on aggregate and were promoted to the Veikkausliiga.
MIFK Mariehamn - Jazz Pori 1-0
Jazz Pori - MIFK Mariehamn 2-2[3]
KPV Kokkola (formerly also KPV-J Kokkola) were promoted to the Ykkönen and Kraft Närpes relegated to the Kakkonen. KPV Kokkola won 4-1 on penalties.
VG-62 Naantali remained in the Ykkönen after beating OLS Oulu 4-1 on aggregate.