Thai cuisine (Thai: อาหารไทย, RTGS: ahan thai, pronounced [ʔāː.hǎːn tʰāj]) is the national cuisine of Thailand.

Thai cooking places emphasis on lightly prepared dishes with strong aromatic components and a spicy edge. Australian chef David Thompson, an expert on Thai food, observes that unlike many other cuisines,^[ Thai cooking is "about the juggling of disparate elements to create a harmonious finish. Like a complex musical chord it's got to have a smooth surface but it doesn't matter what's happening underneath. Simplicity isn't the dictum here, at all."

Traditional Thai cuisine loosely falls into four categories: tom (boiled dishes), yam (spicy salads), tam (pounded foods), and gaeng (curries). Deep-fries, stir-fries, and steamed dishes derive from Chinese cuisine.

In 2017, seven Thai dishes appeared on a list of the "World's 50 Best Foods", an online poll of 35,000 people worldwide by CNN Travel. Thailand had more dishes on the list than any other country. They were: tom yam goong (4th), pad thai (5th), som tam (6th), massaman curry (10th), green curry (19th), Thai fried rice (24th) and nam tok mu (36th).