As for the polyphenol of a noteworthy tea leaf, the expectation for the effect of the stress relaxation is great, and the research is actively done recently. In the present study, the effect of the stress relaxation of marketing and green the tea beverage was pursued by using the saliva amylase enzyme weighing device and the peripheral-blood tube monitor device paying attention to the catechin kind of one of the tea leaf polyphenol. When a total anti oxidative potency of marketing and green the tea beverage is measured with F.R.E.E, and it compared it with the content of the catechin of the food label system of the green tea beverage, the total antioxidative potency value in the total antioxidative potency test of the specimen material is 108-172 μmol HC?O/ ml. The content of the catechin in the food label system was 150-245 ㎎/350ml and a total antioxidative potency were the content of the catechin was understood , and a positive proportion was admitted. In the stress measurement by the saliva amylase revitalization, as for the mirror drawing work, it was effective in no small way as a psychological stressor, and the pursuit of the change in the stress situation was also possible. In the stress relaxation test, the testee in 14 people who decreased the stress by for drinking of marketing and green the tea beverage was the entire about 64% every nine people, and it became a result that the effect of the stress relaxation was able to be expected. When the green tea beverage was used, a lot of answers by the relating item were indispensable beverages daily for the Japanese green tea, and it was understood to be made to the custom for drinking green tea. Not the item that related to the stress but "Be eating" and "It is suitable for meal"etc. daily life In this study, the effect of a psychological stress relaxation of marketing and green the tea beverage is admitted, and it has been understood to be able to expect not only the oxidant stress but also easing a psychological stress in daily use.