The purpose of the present invention is to provide: a konjac powder which has a high dietary fiber content, and which enables controlling the proportion between water-soluble dietary fibers and insoluble dietary fibers in accordance with purposes, and which is useful for directly ingesting dietary fibers and for blending dietary fibers in a food product; and a method for efficiently producing said konjac powder. In the present invention, a konjac powder is produced by: mixing a konjac raw-material powder and a sugar-calcium hydroxide aqueous solution so as to prepare a mixture in such a manner as to allow powder particles in the konjac raw-material powder to maintain a particle morphology; supplying the sugar-calcium hydrate aqueous solution to the powder particles within the mixture; and generating insoluble dietary fibers within the powder particles proportionally to the amount of calcium supplied to the powder particles.
