Purslane weed has long been used for animal feed in Thailand but has beenunderutilized, and no published data exist on the chemical and nutritionalqualities of Thai wild purslane. In this study, we aimed to determine themicrochemical components of purslane stem, leaf, and flower, including thephenolic acid, flavonoid, ascorbic acid, β-carotene, and fatty acid content.The water extract of the flower fraction contained the highest totalphenolic acid content and had the highest O2-scavengingactivities, whereas leaf contained the highest amount of total flavonoidsand ascorbic acid. The β-carotene content was not significantly different inleaf and flower fractions but was significantly greater than that in stem (P< 0.05). The predominant phenolic acid was chlorogenic acid for allfractions. Rutin was the major flavonoid found in leaf, and myricetin washighest in flower and stem. Alpha linolenic acid (18:3n-3) content rangedfrom 16% (149 mg per 100-g sample) of total fatty acid in stem to 50% (523mg per 100-g sample) in leaf. We suggest that Thai wild purslane could beconsidered a nutritional source for animal feed or an excellent vegetable inthe human diet.