PURPOSE: To obtain barley tea beverage having good odor and free from turbidity and precipitation, by extracting barley tea containing puffed roasted barley.

CONSTITUTION: 1 pts.wt. barley tea consisting of 30W90% barley roasted until puffed and 70W10% unpuffed roasted barley is extracted with 5W15 pts.wt. water adjusted to pH7.5W8.5 and heated to 80W100°C and then the extracted liquid is filtered to remove the residue, cooled to 20W40°C and then centrifuged in state of 4000W9000G pressure to remove an insoluble ingredient. Then the extracted solution is as necessary adjusted to pH5.0W7.0 and passed through filtering layer having 1W25μm pore size and sterilized at 115W145°C to provide the barley tea beverage having ≥5 Fo value when C. botulinum and B. subtills are used as marker germs.