Disclosed is a novel use of superheated stream-treated material. Disclosed is an immune balance-regulating agent comprising a superheated steam-treated product of crown daisy (Chrysanthemum coronarium). This immune balance-regulating agent, which comprises, as the active ingredient, a superheated stream-treated product of crown daisy that has been used as a food for a long time, is a composition having a very high safety and exerting an effect of controlling and normalizing the immune balance of a living organism. The present invention has been completed based on the finding that the superheated steam-treated product of crown daisy has anti-infective and antitumor activities based on type-1 immune stimulating effect and, moreover, shows an effect of ameliorating allergic diseases, which are caused by excessive type 2 immune responses, by controlling immune balance.
