In the present invention, it has been an object to obtain a physical property improvement agent for improving the various physical properties of wheat-based food such as bread, wheat-flour baked sweets, and noodles. By using a water-soluble pea polysaccharide, it is possible to obtain a physical property-improving effect in wheat-based food such as bread, wheat-flour baked sweets, and noodles. In bread and wheat-flour baked sweets, while changes in the mouthfeel caused by aging of starch are suppressed, the workability is enhanced by improving the spreadability of the dough, furthermore, the volume after baking is increased, and mouthfeel with good crispness and meltability in the mouth is obtained. In noodles, it is possible to suppress aging when braised noodles are stored at room temperature or with refrigerating.
