Football clubs in the Thai League 1 compete in the AFC Champions League annually. This details the participation and performances in the competition since its based at 2002 as a result of the merger between the Asian Club Championship, the Asian Cup Winners' Cup and the Asian Super Cup.
<sup>1</sup> PEA FC and TTM FC qualified for 2006 AFC Champions League group stage, but were later disqualified because of failing to fill in their player registration forms in time.<br> <sup>2</sup> Club no longer exists.
Seven clubs represented Thailand at various times in the AFC Asian Club Championship, a football competition which took place each year 1967âÂÂ71 and 1985âÂÂ2002. The most successful Thai club was Bangkok Bank F.C., which qualified nine times.
A total of seven clubs represented Thailand in the AFC Asian Club Championship, which became defunct in 2002.
W : Winner
Thai clubs history of playing in the AFC Cup / AFC Champions League Two. Osotsapa were the first side to take part since the competition started in 2004. After the revamping of the Champions League in 2009, Thai clubs once again entered. Since 2013, Thailand was given a direct spot in the AFC Champions League group stage and could not participate in the AFC Cup.
<sup>1</sup> Eliminated from AFC Champions League qualifying stage