SECONDARY BATTERY

Provided is a secondary battery capable of increasing in capacity by reducing a length of a bent area of an electrode tab. The secondary battery including an electrode assembly, which includes a plurality of first electrode plates coated with a first active material, a plurality of second electrode plates coated with a second active material, and a separator disposed between each of the first electrode plates and each of the second electrode plates, includes a plurality of first base material tabs protruding from the plurality of first electrode plates, respectively, and a plurality of second base material tabs protruding from the plurality of second electrode plates, respectively. Each of the plurality of first base material tabs and each of the plurality of second base material tabs are gathered to one end of the electrode assembly in a thickness direction of the electrode assembly and are coupled to each other.