Provided are a method for producing a beverage, in which the imparting of an undesirable odor is suppressed, and a method for improving the flavor of a beverage. The method for producing a beverage according to one embodiment of the present invention comprises producing a beverage using a raw material liquid, wherein hops that have been subjected to acid treatment are added to the raw material liquid. The method for improving the flavor of a beverage according to one embodiment of the present invention comprises improving the flavor of a beverage produced using a raw material liquid, wherein the flavor of the beverage is improved by adding hops that have been subjected to acid treatment to the raw material liquid.