The 2004-05 Thai Premier League had 10 teams. Two clubs would be relegated as the league would be expanded to 12 teams for the 2006 season. Two teams promoted from the rival Provincial League and two clubs from Thailand Division 1 League. The team that finished in 8th position would play in a relegation play-off.

Member clubs

Final league table

Kings Trophy

The King's Trophy was an end of season match between the two clubs that finished first and second in the final Premier League standings. Thailand Tobacco Monopoly, who won the Premier League, beat league runners up Provincial Electricity Authority 4-1.

Queens Cup

The Queen's Cup was postponed because of lack of sponsorship, will be held next year but with reduced prize money.

Asian Representation

Annual awards

Coach of the Year

Player of the year

Top scorer

Champions