The purpose of the present invention is to provide a composition for promoting interferon ? production, said composition comprising an active ingredient exerting an effect of promoting interferon ? production on BDCA3DCs, and a method for producing the same. The present invention relates to: (1) a composition for promoting interferon ? production, said composition comprising, as an active ingredient, cells of a lactic acid bacterium, which can be cultured under stress conditions, cell components thereof or a culture product thereof； and (2) a method for producing a composition for promoting interferon ? production, said method comprising culturing a lactic acid bacterium, which can be cultured under stress conditions, to give the cells of the lactic acid bacterium, cell components thereof or a culture product thereof.
