PROBLEM TO BE SOLVED: To provide a fermented product using cow milk curd and whey, and to provide a method for producing the fermented product.SOLUTION: This method for producing the fermented product includes: a process of producing Koji by inoculating Aspergillus oryzae to a mixture of cow milk curd and cereals a process of preparing unrefined lees by adding common salt to the Koji thus obtained and a process of adding yeast to the unrefined lees to ferment. Furthermore, the method includes addition of whey in any of the processes. The fermented product obtained by the method is also provided.COPYRIGHT: (C)2010,JPO&INPIT【課題】牛乳カード及び乳清を利用した発酵物及びその製造方法を提供すること。【解決手段】牛乳カードと穀類の混合物に麹菌を接種して製麹する工程、得られた麹に食塩を添加してもろみを調製する工程、もろみに酵母を添加して発酵させる工程を有する発酵物の製造方法であって、上記工程のいずれかにおいて、乳清を添加することを特徴とする方法、及び前記方法によって得られる発酵物。【選択図】なし