disposed over the diffuser plate 130 and coupled to the lower receiving container 160 to receive the diffuser plate 130 the optical sheets 120 the reflective members 140 a 140 b and the substrate units 150 a 150 b the display panel assembly 30 is disposed on the middle frame 110 the lower receiving container 160 includes a base plate and a plurality of sidewalls extending from the base plate to receive the diffuser plate 130 the optical sheets 120 the reflective members 140 a 140 b and the substrate units 150 a 150 b the coupling hole 183 is formed on the base plate the upper receiving container 20 covers the edges of the display panel assembly 30 and is coupled to the lower receiving container 160 fig2 is a cross sectional view showing the coupling member 170 of the display device shown in fig1 fig3 is a cross sectional view showing the coupling member 170 extending through the coupling holes of the display device shown in fig1 referring to fig2 and 3 the coupling member 170 includes a head portion 172 a pillar portion 174 protruding from the head portion 172 and a hook portion 176 extending from the pillar portion 174 the outer surface of the hook portion 176 includes an upper inclined surface 176 a and a lower inclined surface 176 b the shape of the head portion 172 may be a circle when viewed from the top the width of the pillar.