A nonaqueous electrolyte secondary battery includes an exterior package, an electrode assembly, and an electrolyte solution. In a cross section orthogonal to a winding axis of the laminated assembly, the electrode assembly has a contour line having a corner-rounded rectangular shape. The contour line consists of a first arc-shaped portion, a straight line portion, and a second arc-shaped portion. The contour line has a height ratio (R1=H0/H1) of 1.20 to 1.35. H0 represents a distance between two points most distant from each other on the contour line. H1 represents an average length of the two line segments. The separator includes a first main surface and a second main surface. The first main surface is in contact with the negative electrode plate. A first dynamic coefficient of friction between the first main surface and the negative electrode plate is 0.52 to 0.66.