2005 K League

Two winners were guaranteed their slot in the end-of-season playoffs.

Incheon United and Ulsan Hyundai Horang-i also joined the playoffs according to the overall table after two stages.

The two victorious teams faced each other in the two-legged championship final.

Ulsan won the first leg 5–1 at the Incheon stadium, and though Incheon won the second leg 2–1, Ulsan lifted their second league title 6–3 on aggregate.

The top two teams in the overall table qualified for the championship playoffs.