Black jasmine rice (Oryza sativa var. Hom Nil) is a great source of antioxidants mainly present in its pericarp and the beverage extracted from this part is considered a functional food. However, production of beverage is normally involved the heat treatment for safety purpose but possibly destroys some antioxidants. Ultraviolet (UV) radiation is thus proposed as an alternative process to reduce microbial contaminants and its effect on antioxidant activities is also determined. UVtreatment through 6×6 W lamps at the lowest flow rate of 0.4 L/mincoulddecrease(p>0.05) the total plate count as well as yeast and mold count in the beverage for 0.39 and 0.75log CFU/mL, respectively. Antioxidant activities, analyzed by ABTS and FRAP assays, in the black jasmine rice pericarp beverage were significantly (p