An apparatus for manufacturing an electrode assembly, comprising: a separator feeding unit comprising a first roll on which one side of a separator strip is wound and a second roll on which the other side of the separator strip opposite to the one side is wound, wherein the first and second rolls respectively unwind the separator strip so that the separator strip is fed toward a core portion of the separator strip disposed between the first and second rolls; a separator folding unit for rotating the core portion so that the one side of the separator strip unwound from the first roll and the other side of the separator strip unwound from the second roll respectively are pulled toward the core potion and then winding the separator strip around the core portion to form a separator spiral folded in a spiral shape about the core portion and comprising at least the core portion; a first dancing roller installed between the first roll and the core portion and reciprocating along a predetermined path to adjust tension acting on the one side of the separator strip unwound from the first roll; a second dancing roller (lOd) installed between the second roll and the core portion and reciprocating along a predetermined path to adjust tension acting on the other side of the separator strip unwound from the second roll; a first electrode lamination unit for laminating first electrode members on one surface of the separator spiral; and a second electrode lamination unit for laminating second electrode members on the other surface of the separator spiral opposite to the one surface, wherein each time the first and second electrode members are newly laminated on the separator spiral, the separator folding unit winds the separator strip so that newly laminated first and second electrode members are covered with the separator strip, and as a result, the first and second electrode members are interposed between two neighboring layers of the separator spiral to form an electrode assembly; wherein the separator folding unit comprises folding jigs capable of gripping or releasing the separator spiral and the newly laminated first and second electrode members together; and rotary members axially coupled to the folding jigs and rotating the folding jigs so that, when the folding jigs grip the separator spiral and the newly laminated first and second electrode members together, the newly laminated first and second electrode members are covered with a separator strip newly wound on the separator spiral. a separator feeding unit comprising a first roll on which one side of a separator strip is wound and a second roll on which the other side of the separator strip opposite to the one side is wound, wherein the first and second rolls respectively unwind the separator strip so that the separator strip is fed toward a core portion of the separator strip disposed between the first and second rolls; a separator folding unit for rotating the core portion so that the one side of the separator strip unwound from the first roll and the other side of the separator strip unwound from the second roll respectively are pulled toward the core potion and then winding the separator strip around the core portion to form a separator spiral folded in a spiral shape about the core portion and comprising at least the core portion; a first dancing roller installed between the first roll and the core portion and reciprocating along a predetermined path to adjust tension acting on the one side of the separator strip unwound from the first roll; a second dancing roller (lOd) installed between the second roll and the core portion and reciprocating along a predetermined path to adjust tension acting on the other side of the separator strip unwound from the second roll; a first electrode lamination unit for laminating first electrode members on one surface of the separator spiral; and a second electrode lamination unit for laminating second electrode members on the other surface of the separator spiral opposite to the one surface, wherein each time the first and second electrode members are newly laminated on the separator spiral, the separator folding unit winds the separator strip so that newly laminated first and second electrode members are covered with the separator strip, and as a result, the first and second electrode members are interposed between two neighboring layers of the separator spiral to form an electrode assembly; wherein the separator folding unit comprises folding jigs capable of gripping or releasing the separator spiral and the newly laminated first and second electrode members together; and rotary members axially coupled to the folding jigs and rotating the folding jigs so that, when the folding jigs grip the separator spiral and the newly laminated first and second electrode members together, the newly laminated first and second electrode members are covered with a separator strip newly wound on the separator spiral.