Disclosed are: a novel powdery soybean protein material from which a protein can be extracted without deteriorating extraction efficiency and which enables the production of an aqueous solution of the protein having improved transparency and a process for producing the powdery soybean protein material. Specifically disclosed is a powdery soybean protein material characterized by comprising at least one emulsifying agent selected from the group consisting of a sorbitan fatty acid ester, a glycerin fatty acid ester and a sucrose fatty acid ester and dextrin. In the powdery soybean protein material, it is preferred that the content of dextrin be 1 to 50 wt%, the content of the emulsifying agent be 0.1 to 10 wt%, the emulsifying agent have an HLB value of 2 to 13, and dextrin have a DE value of 10 to 35.
