To provide a sealed lead acid storage battery having an excellent cyclic lifetime without dropping the capacity in a short time.

A cylindrical sealed lead acid battery has an element formed by winding a positive electrode plate and negative electrode plate spirally with a separator interposed, and each electrode plate of band shape includes a base consisting of a lead alloy foil having active material layers on both sides, wherein the rate of opening of the lead alloy foil of positive electrode is 5-50%, and the active material thickness of the positive electrode plate is 0.06-0.20mm.