PROBLEM TO BE SOLVED: To provide an inexpensive material for soil utilizing waste and being superior in water permeability, water holding and safety.SOLUTION: A material for soil is provided that contains porous inorganic scraps of which particle size is not more than 30 mm and which consists of at least one of crushed waste roof tiles, crushed waste ceramics and crushed waste bricks, and a compaction material of which particle size is not more than 30 mm. The compaction material can contain at least one of waterworks sludge, paper sludge, polymer and bamboo scraps, or at least one of ground waste roof tiles, ground waste bricks, gypsum scraps, crushed stone (sand) powder and screenings of which particle size is not more than 0.075 mm. Besides, a soil improvement method is provided that blends the material for soil with existing soil.
