Described is an acid oil-in-water emulsified composition comprising an oil phase having a diglycerides content of 30 wt. % or greater and a yolk, wherein a ratio of lysophospholipids to the whole phospholipids is at least 15% in terms of a phosphorus amount. The composition has excellent storage stability, appearance, taste and physical properties even if it contains diglycerides in a high concentration without decreasing the amount of the yolk.