ELECTRODE AND SECONDARY BATTERY

In a positive electrode, which is an example of an embodiment, a positive electrode mixture layer (31A) has a tail region (33A) in which there are formed a plurality of tail portions (34A) extending in the length direction of a positive electrode core body (30) from one edge of a core body exposed portion (32A), and a positive electrode mixture layer (31B) has a tail region (33B) in which there are formed a plurality of tail portions (34B) extending in the length direction of the positive electrode core body (30) from one edge of a core body exposed portion (32B). The positive electrode mixture layers (31A, 31B) are formed so that at least tail leading end regions (37A, 37B) do not overlap in the thickness direction of the positive electrode core body (30).