A display device includes a display panel, an accommodating member including a bottom portion and a sidewall extending from the bottom portion, a backlight unit including a light source inside the accommodating member and a light source substrate inside the accommodating member and on which the light source is mounted, and a driving substrate connected to the light source substrate disposed inside the accommodating member. The driving substrate includes a first extending portion disposed outside the accommodating member, a second extending portion extended from the first extending portion and through the sidewall of the accommodating member to dispose an end portion of the second extending portion inside the accommodating member, and a pad portion disposed on a lower surface of the end portion of the second extending portion and inside the accommodating member. The pad portion is electrically connected to the light source substrate disposed inside the accommodating member.