PURPOSE: To solve trouble of intake means which has bad effect in order to continuously take a galenical drug in daily and characteristic bitter taste and odor which galenical drug has and facilitate continuous intake of the galenical drug by adding the galenical drug to fermented soybean and taking this galenical drug-containing fermented soybean by daily meal.

CONSTITUTION: Fermented soybean obtained by adding a galenical drug in a process for producing fermented soybean. A method for producing this fermented soybean is carried out by liquidizing the galenical drug, adding this liquidized galenical drug to boiled soybean together with Bacillus natto and fermenting the soybean. Other method for producing this fermented soybean is carried out by adding the solid (e.g. powdery) galenical drug to soybean in a stage before boiling, boiling the soybean to which the galenical drug is added, adding Bacillus natto to the boiled soybean and fermenting the soybean.