An electrode lead connecting structure comprising: a printed circuit board having a rectangular shape and comprising an electrical circuit pattern; a first electrode-integrated sensing busbar comprising a first L-shaped end strip busbar electrically connected to the electrical circuit pattern at a lowest level of one side edge of the printed circuit board, and a first electrode busbar protruding downward from the lower edge of the first L-shaped end strip busbar, bent perpendicularly to the first L-shaped end strip busbar, and extending in a plate shape; a second electrode-integrated sensing busbar comprising a second L-shaped end strip busbar electrically connected to the electrical circuit pattern at a highest level of an opposite side edge of the printed circuit board, and a second electrode busbar protruding upward from the upper edge of the second L-shaped end strip busbar, bent perpendicularly to the second L-shaped end strip busbar, and extending in a plate shape; a first sensing busbar group comprising first L-shaped middle strip busbars (21, 22, 23, 25, 27, 29) electrically connected to the electrical circuit pattern at the one side edge and regularly arranged adjacent to the first L-shaped end strip busbar at a certain interval in an upward direction from the first L-shaped end strip busbar; a second sensing busbar group comprising second L-shaped middle strip busbars (71, 72, 73, 75, 77,79) electrically connected to the electrical circuit pattern at the opposite side edge and regularly arranged under the second L-shaped end strip busbar; and said first and second electrode-integrated sensing busbars (50 and 100) facing each other in a diagonal direction; said first L-shaped end strip busbar and said second L-shaped middle strip busbar, said first L-shaped middle strip busbar and said second L-shaped end strip busbar, and said first and second L-shaped middle strip busbars (21, 22, 23, 25, 27) and (71, 72, 73, 75, 77) face each other, protrude from said printed circuit board, are bent toward two sides, and extend in directions away from each other; and said first L-shaped end strip busbar and said first L-shaped middle strip busbars (21, 22, 23, 25, 27, 29) have the same length as said second L-shaped end strip busbar and said second L-shaped middle strip busbars from the printed circuit board (71, 72, 73, 75, 77,79). a printed circuit board having a rectangular shape and comprising an electrical circuit pattern; a first electrode-integrated sensing busbar comprising a first L-shaped end strip busbar electrically connected to the electrical circuit pattern at a lowest level of one side edge of the printed circuit board, and a first electrode busbar protruding downward from the lower edge of the first L-shaped end strip busbar, bent perpendicularly to the first L-shaped end strip busbar, and extending in a plate shape; a second electrode-integrated sensing busbar comprising a second L-shaped end strip busbar electrically connected to the electrical circuit pattern at a highest level of an opposite side edge of the printed circuit board, and a second electrode busbar protruding upward from the upper edge of the second L-shaped end strip busbar, bent perpendicularly to the second L-shaped end strip busbar, and extending in a plate shape; a first sensing busbar group comprising first L-shaped middle strip busbars (21, 22, 23, 25, 27, 29) electrically connected to the electrical circuit pattern at the one side edge and regularly arranged adjacent to the first L-shaped end strip busbar at a certain interval in an upward direction from the first L-shaped end strip busbar; a second sensing busbar group comprising second L-shaped middle strip busbars (71, 72, 73, 75, 77,79) electrically connected to the electrical circuit pattern at the opposite side edge and regularly arranged under the second L-shaped end strip busbar; and said first and second electrode-integrated sensing busbars (50 and 100) facing each other in a diagonal direction; said first L-shaped end strip busbar and said second L-shaped middle strip busbar, said first L-shaped middle strip busbar and said second L-shaped end strip busbar, and said first and second L-shaped middle strip busbars (21, 22, 23, 25, 27) and (71, 72, 73, 75, 77) face each other, protrude from said printed circuit board, are bent toward two sides, and extend in directions away from each other; and said first L-shaped end strip busbar and said first L-shaped middle strip busbars (21, 22, 23, 25, 27, 29) have the same length as said second L-shaped end strip busbar and said second L-shaped middle strip busbars from the printed circuit board (71, 72, 73, 75, 77,79).