Nutrient components of different cultivar (‘Ziton’、‘Bargeton’、‘Zichupoton’) fruits of sweet Thai tamarind (Tamarindus indica L.) were analyzed. The results showed that the contents of total sugar and reducing sugar in fruit of three cultivars were 45.90%-50.26% and 33.66%-46.94% respectively, Vc content was 0.33%-0.87%, Ca content was 1.2-2.0 mg·g^-1. The ratio of essential amino acids to total amino acids was 27.68%-45.85%. It shows that sweet Thai tamarind can be utilized widely in fruit, beverage and food.