The accident happened at 6am on the Bangkok-bound Chon Buri bypass road in Tambon Ban Suan in Muang district.
Firefighters took about an hour to put out the blaze, while the approximately 4,500 chickens aboard cried out loudly in apparent fright of the fire.
The truck driver, Jakkaphan Jomrat, 27, said he was transporting the chicken from a farm in Chon Buri’s Ban Pho district to a food processing factory in Bangkok when its right rear brake got stuck. He said he stopped on the roadside to try to fix the brake, but a fire broke out.