A secondary battery comprising: an electrode assembly comprising a main tab ; a current collecting member adjacent the main tab ; and a sub-tab electrically connecting the main tab to the current collecting member , wherein the electrode assembly comprises a plurality of first and second electrode plates and separators stacked on each other and has a pair of long-side regions and a short-side region extending between the long-side regions , wherein the main tab extends from a portion of the short-side region of the electrode assembly , and wherein the current collecting member includes a vertical portion contacting the short-side region of the electrode assembly and having a slit through which the main tab passes, characterized in that the vertical portion of the current collecting member comprises: a first region at one side of the slit and contacting the short-side region of the electrode assembly ; a second region at another side of the slit and contacting the short-side region of the electrode assembly ; and a third region connecting the first region with the second region and contacting the short-side region of the electrode assembly , and the sub-tab comprises: a first section welded to the first region of the current collecting member ; a second section welded to the second region of the current collecting member ; a third section extending from the first section and welded to one surface of the main tab ; and a fourth section extending from the second section and welded to another surface of the main tab , wherein the main tab is inserted between the third section and the fourth section of the sub-tab and is welded to the third section and the fourth section of the sub-tab , the sub-tab and the main tab being bent in the same direction on the current collecting member in a direction parallel to the vertical portion of the current collecting member . an electrode assembly comprising a main tab ; a current collecting member adjacent the main tab ; and a sub-tab electrically connecting the main tab to the current collecting member , wherein the electrode assembly comprises a plurality of first and second electrode plates and separators stacked on each other and has a pair of long-side regions and a short-side region extending between the long-side regions , wherein the main tab extends from a portion of the short-side region of the electrode assembly , and wherein the current collecting member includes a vertical portion contacting the short-side region of the electrode assembly and having a slit through which the main tab passes, characterized in that a first region at one side of the slit and contacting the short-side region of the electrode assembly ; a second region at another side of the slit and contacting the short-side region of the electrode assembly ; and a third region connecting the first region with the second region and contacting the short-side region of the electrode assembly , and a first section welded to the first region of the current collecting member ; a second section welded to the second region of the current collecting member ; a third section extending from the first section and welded to one surface of the main tab ; and a fourth section extending from the second section and welded to another surface of the main tab , wherein the main tab is inserted between the third section and the fourth section of the sub-tab and is welded to the third section and the fourth section of the sub-tab , the sub-tab and the main tab being bent in the same direction on the current collecting member in a direction parallel to the vertical portion of the current collecting member . <EOS>