To provide a grating body, having high corrosion resistance, and a storage battery superior a service life characteristic by restraining the occurrence of cracks of the node part of the grating body for the storage battery, using rotary expanding method.

In the rotary expansion method, by making a pair of rollers facedly mesh by alternately arranging a projecting blade and a flat part on the circumference and superposing a plurality of disk-like cutters in the flat part a plurality of strips of intermittent slits are formed on a lead alloy sheet for passing between the pair of rollers; filament parts 21 between the adjacent slits are overhung, in a mutually inversely turning curved shape in almost the vertical direction to a lead alloy sheet surface; intermittent parts of the intermittent slits are alternately cut by meshing of the flat part; and the intermittent slits are formed in a zigzag shape, and a meshing quantity d in the flat part is set to 0.05 mm to 0.90 mm.