[Object] The purpose is to produce fermented milk containing lactic acid bacteria and bifidobacteria while increasing and maintaining the number of live bifidobacteria by a simple method.[Solving Means] A method for producing fermented milk in which a first step for mixing raw material milk, lactic acid bacteria, and bifidobacteria and a second step for fermenting the raw material milk are carried out in order, wherein a step for adding lactase to the raw material milk (lactase addition step) is carried out before the completion of the second step and the lactase addition step is carried out at one or more time point selected from before the first step, almost simultaneously with the first step, or after the first step.
