Career
International Chatchai was called up a several times by Thailand"s former coach Winfried Schäfer. In 2013 he debuted for Thailand in a friendly match against Bhutan. Chatchai also played in the 2013 King"s Cup against North of Korea.
In 2013 Chatchai was called up to the national team by Surachai Jaturapattarapong to the 2015 AFC Asian Cup qualification.
In May 2015, he was called up to Thailand to play in the 2018 qualification (AFC) against Vietnam.