It is an object of the present invention to provide a semisolid high nutritional food which does not cause thickening or aggregation even if it has a pH in the acidic range, has high emulsion stability of the fat and has good flavor and can be ingested orally It is an issue. By using a specific protein material as a nitrogen source, it is possible to obtain a semisolid high-nutritious food with high protein concentration and high energy, showing stable physical properties even if it has a pH in an acidic region, and having a good flavor And found that the present invention was completed.本発明は、酸性領域のpHを有していても増粘や凝集を生じず、油脂の乳化安定性も高く、かつ風味良好で経口摂取も可能な半固形状高栄養食品を提供することを課題とする。 窒素源として特定のタンパク質素材を使用することで 高タンパク質濃度かつ高エネルギーで、かつ酸性領域のpHを有していても安定な物性を示し、風味良好な半固形状の高栄養食品を得ることができることを見出し、本発明を完成させるに到った。