To provide a sandbag excellent in applicability to emergency as well as the excellence in storage efficiency and workability.

After water absorbing polymer is directly stored in a bag made of textile 1 or stored in a plurality of small bags without water permeability and passing through polymer particle, storage and seal are made, and the textile 1 having such an opening in texture as it is not made to pass through a water permeable polymer particle is used, if desirable. The textile bag is a gusset bag having a foldout pleat, or clay is charged in the bag together with water absorbing polymer.