The 2004 K League Championship was the eighth competition of the K League Championship, and was held to decide the 22nd champions of the K League. After the regular season was finished, the first stage winners, the second stage winners, and the top two clubs in the overall table qualified for the championship. Each semi-final was played as a single match, and the final consisted of two matches.
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0âÂÂ0 on aggregate. Suwon Samsung Bluewings won 4âÂÂ3 on penalties.