It is intended to provide a food which is rich in active ingredients contained in a bean (e.g., adzuki bean) peel and has the original favorable taste of the bean and a low calorie, and a method for producing a food material thereof. The present invention provides a food made of, as a raw material, a bean peel A milled into fine particles with a desired particle size by a wet milling process, and a method for producing a food material made of a bean peel as a raw material, comprising: a dehydration step S10 of dehydrating a peel A separated from boiled adzuki beans a into a predetermined water content a primary milling step S11 of milling the peel A obtained by the dehydration step, into a desired particle size a water addition adjustment step S12 of adjusting, by water addition, the water content of the peel powder A-1 obtained by the primary milling step, to a predetermined level and a secondary milling step S13 of milling the peel powder A-1 obtained by the water addition adjustment step, into fine particles such that the palisade tissues of the peel powder A-1 are separated in a fine, almost rod-like form.
