PROBLEM TO BE SOLVED: To provide a sieve for sorting powdery materials or the like which prevents jamming by powdery materials or the like attached to a net part, allows a minute deflection within allowable dimensions as an opening of a sorting size to enhance a falling property and can effectively operate impact between vibrations and wire materials.SOLUTION: A sieve is composed of a net and a frame body, the net is formed by crossing tensile strength wire materials in a contact condition, the tensile strength wire materials are composed of lower wire materials and upper wire materials, and the lower wire materials and the upper wire materials are configured to be attached to the frame body in a state where tensile force is respectively generated.SELECTED DRAWING: Figure 1

Tsuchiya Katsuji

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