A display device, comprising: a display panel including a non-display area outside a display area and including a data line and a gate line in the display area, a data driving circuit connected to the data line and adapted to apply a data signal to the data line; a gate driving circuit including a plurality of gate driving chips (551, 552) connected to the gate line and adapted to apply a gate signal to the gate line; a printed circuit board adapted to apply image data signals and data control signals to the data driving circuit; at least one first flexible film having a first end attached to a first side surface of the display panel and another end attached to the printed circuit board, wherein the printed circuit board is adapted to apply a plurality of gate control signals to the plurality of gate driving chips (551, 552) through the at least one first flexible film and the display panel; and at least one second flexible film attached to a second side surface of the display panel, wherein the display panel is characterized by the following features: a signal line, in the display area, connecting the at least one first flexible film and the at least one second flexible film; a pad electrode extending from the signal line; and a side surface connection electrode on the first and second side surfaces (351, 352) and directly contacting the pad electrode, the at least one first flexible film and the at least one second flexible film coupled to the side surface connection electrode and electrically connected to the signal line. a display panel including a non-display area outside a display area and including a data line and a gate line in the display area, a data driving circuit connected to the data line and adapted to apply a data signal to the data line; a gate driving circuit including a plurality of gate driving chips (551, 552) connected to the gate line and adapted to apply a gate signal to the gate line; a printed circuit board adapted to apply image data signals and data control signals to the data driving circuit; at least one first flexible film having a first end attached to a first side surface of the display panel and another end attached to the printed circuit board, wherein the printed circuit board is adapted to apply a plurality of gate control signals to the plurality of gate driving chips (551, 552) through the at least one first flexible film and the display panel; and at least one second flexible film attached to a second side surface of the display panel, wherein the display panel is characterized by the following features: a signal line, in the display area, connecting the at least one first flexible film and the at least one second flexible film; a pad electrode extending from the signal line; and a side surface connection electrode on the first and second side surfaces (351, 352) and directly contacting the pad electrode, the at least one first flexible film and the at least one second flexible film coupled to the side surface connection electrode and electrically connected to the signal line. a signal line, in the display area, connecting the at least one first flexible film and the at least one second flexible film; a pad electrode extending from the signal line; and a side surface connection electrode on the first and second side surfaces (351, 352) and directly contacting the pad electrode, the at least one first flexible film and the at least one second flexible film coupled to the side surface connection electrode and electrically connected to the signal line.