The effect of the regular intake of chamomile tea, a beverage that potentially reduces stress, in the evening was examined. Fourteen normal women in their 50s and 70s consumed a cup of chamomile tea or plain water everyday after dinner at home for three weeks. Several studies were performed on the first day and after the three week period consumption. The measurement items of the test were frontal electroencephalogram (EEG), salivary amylase activity, peripheral skin temperature, and emotional state. MCL S.1, a standardized questionnaire, was used to determine the scores for feelings of pleasantness, relaxation, and anxiety. It is known that the increase in the EEG alpha wave indicates relaxation and the part of the alpha wave in the right hemisphere increases relative to pleasant stimuli. After drinking chamomile tea for three weeks, the asymmetry coefficient of the frontal alpha wave became significantly high, while an opposite change was observed with plain hot water. The salivary amylase activity, whose activation is known to be lowered by pleasant stimuli, was significantly decreased after drinking chamomile tea for three weeks. The peripheral skin temperature, which rises when relaxed, was increased after three week intake of chamomile tea. As for the emotional state, feelings of pleasantness and relaxation were increased. Thus, the stress reduction capacity of the continuous intake of chamomile tea was suggested.