It took a break for the 2006 FIFA World Cup in June and July.
SK Group, the owners of Bucheon SK, moved their club to Jeju, and renamed the club Jeju United.
The club was based in the Jeju World Cup Stadium of Seogwipo.
Gyeongnam FC joined the K League, increasing the number of clubs to fourteen.
The top two teams in the overall table qualified for the championship playoffs.