To provide a control valve type lead-acid battery in which a separator is hardly broken and short circuit hardly arises.

This grid 9 to be used in the control valve type lead-acid battery is manufactured by a book mold casting method. The impression of a casting mold is produced so that a longitudinal framework 2 and a lateral framework 1 of the grid 9 have a rounded part. The rounded part of the longitudinal framework 2 and the lateral framework 1 of the grid 9 is made 0.6-0.8 mm.