He had also served as speaker of the House of Representatives from 2008-2011.

He is the father of current Transport Minister Saksayam Chidchob, and Newin Chidchob, a former member of Parliament and current president of Buriram United football club.

Chai is a member of the House of Representatives, a former member of the National Reform Steering Assembly and a former member of the National Reform Council. He has long been a member of the House of Representatives, affiliated with different parties, and a senator of Buriram province.