The 2003–04 Slovak First Football League (known as the Slovak Corgoň Liga for sponsorship reasons) was the 11th season of first-tier football league in Slovakia, since its establishment in 1993.

It began on 19 July 2003 and ended on 8 June 2004.

[1] MŠK Žilina were the defending champions.

A total of 10 teams was contested in the league, including 9 sides from the 2002–03 season and one promoted from the 2.

The one relegated team were replaced by Dukla Banská Bystrica.