A display apparatus comprising a display module, a touch screen module providing a touch space in front of the display module, and a printed circuit board behind the display module, wherein the touch screen module comprises: a plurality of light emitters (31a, 31b) mounted on the printed circuit board, to emit infrared rays; a light receiver (32a, 32b) located on the printed circuit board, spaced apart from the plurality of light emitters, to receive infrared rays; and a light guide member surrounding the perimeter of the display module, to guide infrared rays emitted from the plurality of light emitters (31a, 31b) to be incident into the touch space and guide the infrared rays incident into the touch space to be received by the light receiver (32a, 32b), wherein an interference fit is provided between the printed circuit board and the light guide member through elastic deformation of at least one thereof, wherein the light guide member comprises a plurality of coupling protrusions (340, 340a, 340b, 340c, 341), and the printed circuit board comprises a plurality of coupling holes (410, 410c, 411) to be combined with the plurality of coupling protrusions (340, 340a, 340b, 340c, 341), and wherein a width of the plurality of coupling holes (410, 410c, 411) is less than that of the plurality of coupling protrusions (340, 340a, 340b, 340c, 341) before the plurality of coupling holes (410, 410c, 411) are combined with the plurality of coupling protrusions (340, 340a, 340b, 340c, 341), and is equal to that of the plurality of coupling protrusions (340, 340a, 340b, 340c, 341) when the plurality of coupling protrusions (340, 340a, 340b, 340c, 341) are combined with the plurality of coupling holes (410, 410c, 411). a plurality of light emitters (31a, 31b) mounted on the printed circuit board, to emit infrared rays; a light receiver (32a, 32b) located on the printed circuit board, spaced apart from the plurality of light emitters, to receive infrared rays; and a light guide member surrounding the perimeter of the display module, to guide infrared rays emitted from the plurality of light emitters (31a, 31b) to be incident into the touch space and guide the infrared rays incident into the touch space to be received by the light receiver (32a, 32b), wherein an interference fit is provided between the printed circuit board and the light guide member through elastic deformation of at least one thereof, wherein the light guide member comprises a plurality of coupling protrusions (340, 340a, 340b, 340c, 341), and the printed circuit board comprises a plurality of coupling holes (410, 410c, 411) to be combined with the plurality of coupling protrusions (340, 340a, 340b, 340c, 341), and wherein a width of the plurality of coupling holes (410, 410c, 411) is less than that of the plurality of coupling protrusions (340, 340a, 340b, 340c, 341) before the plurality of coupling holes (410, 410c, 411) are combined with the plurality of coupling protrusions (340, 340a, 340b, 340c, 341), and is equal to that of the plurality of coupling protrusions (340, 340a, 340b, 340c, 341) when the plurality of coupling protrusions (340, 340a, 340b, 340c, 341) are combined with the plurality of coupling holes (410, 410c, 411).