A display device, comprising: a frame structure having a plurality of extrusion molded members coupled to one another; a display panel; and an intermediate member attached to the frame structure and holding the display panel, wherein the frame structure includes: a first beam and a second beam both extending in a first direction; a first pillar and a second pillar both extending in a second direction, perpendicular to the first direction, and joining both ends of the first beam and the second beam, and a plurality of sub-pillars disposed between the first pillar and the second pillar and extending in the second direction to join the first beam and the second beam, wherein the display device further comprises a surface light emitting unit, wherein the display panel is a transmissive liquid crystal display panel having a display surface that displays an image, a back surface on a side opposite to the display surface, and an end surface that joins the display surface and the back surface, and the surface light emitting unit is disposed inside the frame structure and applies light to the back surface of the display panel, wherein the surface light emitting unit includes: a plurality of light emitting elements each emitting the light; and a reflection member that reflects a plurality of rays of the light emitted from the respective plurality of light emitting elements toward the display panel, wherein the plurality of light emitting elements and the reflection member are fixed to at least one of the first pillar, the second pillar, and the plurality of sub-pillars, wherein the reflection member includes: a plurality of divided panels spaced from one another in an in-plane direction of the display panel and each fixed to at least one of the first pillar, the second pillar, and the plurality of sub-pillars; and a plurality of cover members that are disposed to overlap a gap between the plurality of divided panels and reflect the plurality of rays of the light emitted from the respective plurality of light emitting elements toward the display panel. a frame structure having a plurality of extrusion molded members coupled to one another; a display panel; and an intermediate member attached to the frame structure and holding the display panel, wherein the frame structure includes: a first beam and a second beam both extending in a first direction; a first pillar and a second pillar both extending in a second direction, perpendicular to the first direction, and joining both ends of the first beam and the second beam, and a first beam and a second beam both extending in a first direction; a first pillar and a second pillar both extending in a second direction, perpendicular to the first direction, and joining both ends of the first beam and the second beam, and a plurality of sub-pillars disposed between the first pillar and the second pillar and extending in the second direction to join the first beam and the second beam, wherein the display device further comprises a surface light emitting unit, wherein the display panel is a transmissive liquid crystal display panel having a display surface that displays an image, a back surface on a side opposite to the display surface, and an end surface that joins the display surface and the back surface, and the surface light emitting unit is disposed inside the frame structure and applies light to the back surface of the display panel, wherein the surface light emitting unit includes: a plurality of light emitting elements each emitting the light; and a reflection member that reflects a plurality of rays of the light emitted from the respective plurality of light emitting elements toward the display panel, wherein the plurality of light emitting elements and the reflection member are fixed to at least one of the first pillar, the second pillar, and the plurality of sub-pillars, a plurality of light emitting elements each emitting the light; and a reflection member that reflects a plurality of rays of the light emitted from the respective plurality of light emitting elements toward the display panel, wherein the plurality of light emitting elements and the reflection member are fixed to at least one of the first pillar, the second pillar, and the plurality of sub-pillars, wherein the reflection member includes: a plurality of divided panels spaced from one another in an in-plane direction of the display panel and each fixed to at least one of the first pillar, the second pillar, and the plurality of sub-pillars; and a plurality of cover members that are disposed to overlap a gap between the plurality of divided panels and reflect the plurality of rays of the light emitted from the respective plurality of light emitting elements toward the display panel. a plurality of divided panels spaced from one another in an in-plane direction of the display panel and each fixed to at least one of the first pillar, the second pillar, and the plurality of sub-pillars; and a plurality of cover members that are disposed to overlap a gap between the plurality of divided panels and reflect the plurality of rays of the light emitted from the respective plurality of light emitting elements toward the display panel.