Provided is a novel dairy product that has a certain hardness and a good flavor. The dairy product contains a casein-containing starting material derived from milk and a protein comprising an amino acid sequence that has a 90% or higher identity to the amino acid sequence represented by SEQ ID NO:1.本發明提供一種具有一定之硬度且風味良好之新穎之乳製品。本發明之乳製品含有含酪蛋白之來自乳之原料、及包含與序列編號1所表示之胺基酸序列之同一性為90%以上之胺基酸序列之蛋白質。