A display device includes a first housing containing a display panel between a backlight and the first housing, the backlight includes a light source substrate, and a second housing that holds the light source substrate, the second housing includes a back surface portion and a first side wall portion protruded in a front surface direction of the backlight from the back surface portion, the light source substrate is fixed to an inside of the first side wall portion, an opening is provided in the first side wall portion so as to overlap the light source substrate, the first housing includes a front surface frame portion and a second side wall portion protruded in a back surface direction of the backlight from the front surface frame portion, a projected portion is provided in an inside of the second side wall portion, and the projected portion is fitted into the opening.