LEAD ACID STORAGE BATTERY

A lead acid storage battery according to the present invention uses a positive electrode grid body made of a lead-calcium-tin based alloy, and a negative electrode grid body made of either a lead-calcium based alloy or a lead-calcium-tin based alloy. The present invention is featured in that, among a strap provided by integrally welding negative electrode lug sections with each other, an inter-cell connecting section, and an electrode pole, at least the strap is made of a lead-antimony based alloy. Further, the present invention is featured in that a lead-tin alloy layer is provided on the negative electrode lug section, and in that carbon is contained in a negative electrode active material in an amount corresponding to 0.25 to 0.75% of the mass of the negative electrode active material after the full charging of the lead acid storage battery.