A display device comprising: a display panel that displays an image; a plurality of mount boards having long-length shapes disposed along the display panel ; light emitting elements arrayed on each of the plurality of mount boards in a longitudinal direction of each of the plurality of mount boards , the light emitting elements emitting light toward the display panel from behind the display panel , and being arranged in a matrix shape along the display panel ; a back surface board ; a reflective sheet mounted to the back surface board , the reflective sheet having holes (151; 1082) through which the light emitting elements pass through at positions corresponding to the light emitting elements , and reflecting the light emitted from the light emitting elements toward the display panel , and a relay board having a long-length shape and being provided to supply power to the light emitting elements , wherein each of the plurality of mount boards is constituted of a flexible wiring board, wherein on a surface of the back surface board on which the plurality of mount boards is stuck, a recess , which is depressed toward an opposite surface of the surface on which the plurality of mount boards is stuck , is provided in a direction perpendicular to the longitudinal direction of each of the plurality of mount boards , and wherein the relay board is placed in the recess and is placed at an end of each of the plurality of mount boards , said ends being deformed along the shape of the recess and being located in the recess , such that the relay board is electrically connected with each of the plurality of mount boards . a display panel that displays an image; a plurality of mount boards having long-length shapes disposed along the display panel ; light emitting elements arrayed on each of the plurality of mount boards in a longitudinal direction of each of the plurality of mount boards , the light emitting elements emitting light toward the display panel from behind the display panel , and being arranged in a matrix shape along the display panel ; a back surface board ; a reflective sheet mounted to the back surface board , the reflective sheet having holes (151; 1082) through which the light emitting elements pass through at positions corresponding to the light emitting elements , and reflecting the light emitted from the light emitting elements toward the display panel , and a relay board having a long-length shape and being provided to supply power to the light emitting elements , wherein each of the plurality of mount boards is constituted of a flexible wiring board, wherein on a surface of the back surface board on which the plurality of mount boards is stuck, a recess , which is depressed toward an opposite surface of the surface on which the plurality of mount boards is stuck , is provided in a direction perpendicular to the longitudinal direction of each of the plurality of mount boards , and wherein the relay board is placed in the recess and is placed at an end of each of the plurality of mount boards , said ends being deformed along the shape of the recess and being located in the recess , such that the relay board is electrically connected with each of the plurality of mount boards . <EOS>