A display device comprising: a display component; a light source disposed on a rear side of the display device relative to the display component, the light source being configured to irradiate the display component with light from the rear side; a rear side support member supporting the light source from the rear side; and a reflective sheet configured to reflect the light from the light source towards the display component, the reflective sheet includes a bottom face part, a first side face part and a second side face part, the bottom face part being disposed on a surface of the rear side support member while the reflective sheet is attached to the rear side support member, the first and second side face parts (12, 13) being disposed about the bottom face part such that the first and second side face parts (12, 13) define a corner of the reflective sheet while the reflective sheet is attached to the rear side support member, characterised in that, the first and second side face parts (12, 13) have first and second protrusions (12b, 13b) at adjacent end edge portions of the first and second side face parts (12, 13), respectively, the first protrusion protruding towards the end edge portion of the second side face part, the second protrusion protruding towards the end edge portion of the first side face part, and the first protrusion overlaps with the end edge portion of the second side face part from the rear side while the reflective sheet is attached to the rear side support member, the second protrusion overlapping with the end edge portion of the first side face part from the rear side while the reflective sheet is attached to the rear side support member. a display component; a light source disposed on a rear side of the display device relative to the display component, the light source being configured to irradiate the display component with light from the rear side; a rear side support member supporting the light source from the rear side; and a reflective sheet configured to reflect the light from the light source towards the display component, the reflective sheet includes a bottom face part, a first side face part and a second side face part, the bottom face part being disposed on a surface of the rear side support member while the reflective sheet is attached to the rear side support member, the first and second side face parts (12, 13) being disposed about the bottom face part such that the first and second side face parts (12, 13) define a corner of the reflective sheet while the reflective sheet is attached to the rear side support member, characterised in that, the first and second side face parts (12, 13) have first and second protrusions (12b, 13b) at adjacent end edge portions of the first and second side face parts (12, 13), respectively, the first protrusion protruding towards the end edge portion of the second side face part, the second protrusion protruding towards the end edge portion of the first side face part, and the first protrusion overlaps with the end edge portion of the second side face part from the rear side while the reflective sheet is attached to the rear side support member, the second protrusion overlapping with the end edge portion of the first side face part from the rear side while the reflective sheet is attached to the rear side support member.