PROBLEM TO BE SOLVED: To provide a method for producing a powder and granular material having excellent cation exchangeability and excellent anion exchangeability, which method does not necessitate treating alkaline liquid waste but has excellent continuous productivity.SOLUTION: The method for producing the powder and granular material having excellent cation exchangeability and excellent anion exchangeability comprises the steps of: mixing a cation-exchangeable filler, an anion-exchangeable filler and a filler dispersant having cation exchangeability in an alginate aqueous solution to form a mixed suspension dropping the mixed suspension to a polyvalent metal ion aqueous solution to form a gelled particle and washing the gelled particle with water and drying the washed gelled particle. The filler dispersant of 1-15 parts mass is contained in 100 parts mass of the alginate aqueous solution.
