Fractional extraction method of mucin and collagen

Object of this invention is to provide a differential extraction method for separating extracted each from jellyfish which is one of the raw material mucin and collagen, obtained by water-containing crushed solid-liquid separation obtained by crushing the jellyfish a water soluble alcohol of the liquid component and 1 to 4 carbon atoms, to be at least 50 volume% relative to the total concentration of the water-soluble alcohol having 1 to 4 carbon atoms, a mixed solid-liquid mixture obtained by separating protein separation step to obtain a solid by the (a), A mucin-containing liquid component by the protein separation step mixing a water soluble alcohol solution having 1 to 4 carbon atoms is an alcohol concentration of solids and 10 to 40 mass% obtained in (A), then solid-liquid separation and means for differential extraction method mucin and collagen; and a fractionation step (B) demarcating solid-liquid separation into a collagen-containing solid component.