Abstract: The present invention provides a novel heat-treated tea. The heat-treated tea is obtained by placing green tea leaves in a tea drier, supplying the drier with dry air heated externally to 200.degree. to 300.degree. C. and heating the drier from outside to heat the tea leaves to 200.degree. to 300.degree. C. for 20 to 60 minutes. The tea obtained is brown in color and can be served by brewing in hot water as is done with the traditional green or roasted tea. It has special flavor and aroma different from the traditional teas. The extract of said heat-treated tea is effective in disinfection or preventing hung-over or stiff shoulder. Additional of said extract to wheat flour for making noodles and breads will improve the taste and quality of the product.