Provided is a separator for a valve-regulated lead battery, said separator comprising glass fibers and at least one clay mineral selected from among imogolite, sepiolite, kaolin, and saponite. It is preferable that the film thickness of the separator be 0.3-3.0 mm. A valve-regulated lead battery that is provided with the separator for a lead battery is also provided. As a result, it is possible to permanently prevent permeation-induced short circuits during overdischarge and provide a valve-regulated lead battery that has excellent extended use life properties.
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