It is an object of the present invention to provide a method of adjusting productivity of enzymes, in particular, amylolytic enzymes, plant fiber degradation enzymes and proteolytic enzymes in a filamentous fungus culture product, by controlling releasing rate of nutrients from the culture raw material into the culture system when a filamentous fungus culture product is produced by culturing filamentous fungi in liquid medium containing as the culture raw material at least one selected from the group consisting of cereals, beans, tubers, amaranthus and quinoa. The present invention provides a method of producing filamentous fungus culture product by using liquid medium containing as culture raw material at least one selected from the group consisting of cereals, beans, tubers, amaranthus and quinoa comprising； culturing filamentous fungi while releasing rate of nutrients from the culture raw material into the culture system is controlled to adjust productivity of enzymes in the filamentous fungus culture product.
