An electrode body including a positive electrode plate and a negative electrode plate is accommodated in a prismatic outer package having an opening. The opening of the prismatic outer package is sealed with a sealing plate. The electrode body includes positive electrode tab portions stacked at an end portion on the sealing plate side. The stacked positive electrode tab portions are divided into two forming a first tab group and a second tab group. A resin member serving as a holding member holding a metal member is fixed to the sealing plate. The metal member is disposed between the first tab group and the second tab group. Lead portions of a positive electrode collector is connected to the first tab group and the second tab group at a surface positioned opposite to a surface that opposes the metal member.