Bitterness, rough taste and acidity is reduced, mixing of the beverage such as various This invention may, tea extract high stability of non-polymer catechins at the time of the sterilizing process the beverages formulated with this about. Non-polymer catechins (1) solids of (a) is 45 to 90% by weight, Percentage of gallate body (2) non-polymer catechins is from 0.001 to 47% by weight, (3) the amount of gallic acid / non-polymer catechins (weight ratio), purified tea extract is 0.3 or less.本発明は、苦味、酸味及び雑味が低減され、各種の飲料等への配合性が良く、これを配合した飲料等を殺菌処理した際の非重合体カテキン類の安定性の高い茶抽出物に関する。(1)固形分中の非重合体カテキン類(a)が45~90重量%であり、(2)非重合体カテキン類中のガレート体率が0.001~47重量%であり、(3)没食子酸量/非重合体カテキン(重量比)が、0.3以下である精製茶抽出物。