To provide an electrode assembly capable of suppressing tearing of a separator.SOLUTION: An electrode assembly 3 has a structure in which a positive electrode 14, a negative electrode 15 and a separator 13 are wound around an axis along a first direction D1 in a state where the separator 13 is interposed between the positive electrode 14 and the negative electrode 15 which have different polarities. Each second portion 14a2 of metal foil 14a of a positive electrode 14 is provided with a through-hole 14ah penetrating the metal foil 14a. Each second portion 15a2 of metal foil 15a of a negative electrode 15 is provided with a through-hole 15ah penetrating the metal foil 15a. The second portions 14a2 and 15a2 are arranged from the inside to the outside of the electrode assembly 3 in a second direction D2. When viewed from the second direction D2, edges e1 and e2 of the through-holes 14ah and 15ah do not overlap each other between the plurality of through-holes 14ah and 15ah adjacent to each other in the second direction D2.SELECTED DRAWING: Figure 4