A touch screen panel apparatus, comprising: a touch screen panel and a flexible printed circuit board (FPCB) coupled to the touch screen panel, the touch screen panel including: a substrate, a plurality of first electrodes on a first surface of the substrate, a front surface pad unit coupled to the first electrodes, a second electrode on a second surface of the substrate, the second surface being opposite the first surface; and a rear surface pad unit coupled to the second electrode; wherein the flexible printed circuit board comprises: a main substrate unit having a first pad unit coupled to the front surface pad unit; and an auxiliary substrate unit laterally extending from the main substrate unit, wherein the auxiliary substrate unit includes: a first portion (30b1) aligned with the first pad unit and arranged on the first surface of the substrate; and a second portion (30b2) including a second pad unit coupled to the rear surface pad unit, the second portion being connected to the first portion by a plurality of connecting portions (30b3), wherein the connecting portions are folded about an edge of the touch panel so that the second portion (30b2) faces the first portion (30b1) through the substrate. a touch screen panel and a flexible printed circuit board (FPCB) coupled to the touch screen panel, the touch screen panel including: a substrate, a plurality of first electrodes on a first surface of the substrate, a front surface pad unit coupled to the first electrodes, a second electrode on a second surface of the substrate, the second surface being opposite the first surface; and a rear surface pad unit coupled to the second electrode; a substrate, a plurality of first electrodes on a first surface of the substrate, a front surface pad unit coupled to the first electrodes, a second electrode on a second surface of the substrate, the second surface being opposite the first surface; and a rear surface pad unit coupled to the second electrode; wherein the flexible printed circuit board comprises: a main substrate unit having a first pad unit coupled to the front surface pad unit; and an auxiliary substrate unit laterally extending from the main substrate unit, a main substrate unit having a first pad unit coupled to the front surface pad unit; and an auxiliary substrate unit laterally extending from the main substrate unit, wherein the auxiliary substrate unit includes: a first portion (30b1) aligned with the first pad unit and arranged on the first surface of the substrate; and a second portion (30b2) including a second pad unit coupled to the rear surface pad unit, the second portion being connected to the first portion by a plurality of connecting portions (30b3), wherein the connecting portions are folded about an edge of the touch panel so that the second portion (30b2) faces the first portion (30b1) through the substrate. a first portion (30b1) aligned with the first pad unit and arranged on the first surface of the substrate; and a second portion (30b2) including a second pad unit coupled to the rear surface pad unit, the second portion being connected to the first portion by a plurality of connecting portions (30b3), wherein the connecting portions are folded about an edge of the touch panel so that the second portion (30b2) faces the first portion (30b1) through the substrate.