PROBLEM TO BE SOLVED: To provide tea beverage with suppressed flock generation for a long period through using an existing production equipment without the need of a special device to provide an agent for inhibiting flock generation to provide a method for inhibiting flock generation, and to provide a method for producing the tea beverage with suppressed flock generation.SOLUTION: This method for producing the tea beverage comprises adding to tea beverage the agent for inhibiting flock generation which has amino polycarboxylic acid or its salt as the active ingredient. The agent for tea beverage has as the active ingredient amino polycarboxylic acid or its salt having an iminodiacetic acid base which is shown in general formula (I).COPYRIGHT: (C)2008,JPO&INPIT【課題】特別な装置を必要とせず、既存の製造設備を利用して長期間にわたりフロックの発生が抑制された茶飲料及びフロック発生抑制剤、並びにフロック抑制方法およびフロックの発生が抑制された茶飲料の製造方法を提供すること。【解決手段】アミノポリカルボン酸又はその塩を有効成分とするフロック発生抑制剤を茶飲料に添加する。【選択図】なし