Provided is a method for producing a milk-containing beverage capable of effectively suppressing foaming of raw material milk generated during the production process while greatly reducing the dissolved oxygen concentration of the milk-containing beverage. (A) The supply method and supply conditions of the inert gas treatment are controlled, and after the inert gas treatment is performed on the raw milk so that the bubble rate of the raw milk is 10% or less, the raw milk is discharged and dissolved. The first oxygen concentration reduction step for obtaining raw milk with reduced oxygen concentration, and (B) the supply method and supply conditions of the inert gas treatment are controlled, and the bubble rate of the raw milk obtained in step (A) is The raw material milk obtained by the second oxygen concentration reduction step of obtaining raw material milk in which the raw material milk is subjected to an inert gas treatment so that the dissolved oxygen concentration is reduced so as to be 10% or less, and (C) step (B) It is a manufacturing method of the milk containing drink including the heat-sterilization process of heat-sterilizing milk.乳含有飲料の溶存酸素濃度を大きく低減させながらも、かつ、製造過程で発生する原料乳の泡立ちを効果的に抑制できる乳含有飲料の製造方法を提供する。（Ａ）不活性ガス処理の供給方法及び供給条件を制御し、原料乳の気泡率が１０％以下となるように、原料乳に不活性ガス処理を行った後に、原料乳を排出し、溶存酸素濃度を低減させた原料乳を得る第一の酸素濃度低減工程と、（Ｂ）不活性ガス処理の供給方法及び供給条件を制御し、工程（Ａ）で得られた原料乳の気泡率が１０％以下となるように、原料乳に不活性ガス処理を行い、溶存酸素濃度を低減させた原料乳を得る第二の酸素濃度低減工程と、（Ｃ）工程（Ｂ）で得られた原料乳を加熱殺菌する加熱殺菌工程を含む乳含有飲料の製造方法である。
