A negative electrode active material layer (243A) of a lithium-ion secondary battery (100A) contains natural graphite and artificial graphite as negative electrode active material particles. The negative electrode active material layer (243A) has a region (A1) facing the positive electrode active material layer (223) and regions (A2, A3) not facing the positive electrode active material layer (223). The region (A1) facing the positive electrode active material layer (223) contains the natural graphite in a larger proportion than the regions (A2, A3) not facing the positive electrode active material layer (223), and the regions (A2, A3) not facing the positive electrode active material layer (223) contain the artificial graphite in a larger proportion than the region (A1) facing the positive electrode active material layer (223).