Firefighters with two water trucks spent about 20 minutes fighting the fire before managing to extinguish the blaze.
Initial investigation showed that the fire may have been caused by electrical fault with an electrical generator.
Sak Boonyarit, 55, a security guard said he was patrolling the market about 9.30pm when he saw flames from the generator before they spread to the shops nearby. The fire damaged about 30 of 180 shops in the market. The cost of the damage is not yet known.