An object is to provide a sealed battery with reduced electric resistance from a power generation element to an external terminal of the battery and also having a large space for housing the power generation element, and a method of manufacturing the same. A sealed battery 100 comprises a power generation element 120 including positive electrode plates 121 each having a positive electrode active material layer and negative electrode plates 123 each having a negative electrode active material layer, which are alternately arranged. The power generation element 120 is configured such that negative electrode lead portions 123r of the negative electrode plates 123 are provided extending in a predetermined direction. Further, the sealed battery 100 includes a battery case 110 housing the power generation element 120. This battery case 100 includes a negative-electrode case member 115 made of an electrically conductive material and serving as a negative collector plate to which the negative electrode lead portions 123r are connected.