A display device including a back cover; a guide panel positioned at a side of the back cover, the guide panel including a seating portion and a guide wall portion; a display panel supported on the seating portion of the guide panel; a top case including a front part covering an edge portion of a front surface of the display panel and a lateral part covering the guide wall portion of the guide panel, wherein the lateral part of the top case comprises a first part and a second part, the first part being positioned more inward than the second part; a fastener that couples the top case, the guide panel, and the back cover by penetrating the first part of the top case, the guide panel and the back cover; and a rear cabinet that covers the fastener and the first part of the top case. The first part of the top case comprises a horizontal first part and a vertical first part, the horizontal first part and the vertical first part being spaced apart at a corner portion of the top case forming a gap, and an outer surface of the second part of the top case forms a continuous surface without a gap at the corner portion of the top case, and is exposed to an outside of the display device.