Provided is a display device including a display module in which a folding region and first and second non-folding regions facing each other and a heat dissipation sheet disposed on one surface thereof. The heat dissipation sheet includes a first heat dissipation adhesive layer including a first adhesive portion overlapping the first non-folding region and a second adhesive portion overlapping the second non-folding region, a second heat dissipation adhesive layer including a third adhesive portion overlapping the first adhesive portion and a fourth adhesive portion overlapping the second adhesive portion, a heat dissipation layer including a first heat dissipation portion disposed between the first adhesive portion and the third adhesive portion and a second heat dissipation portion disposed between the second adhesive portion and the fourth adhesive portion, and an auxiliary adhesive layer including a first auxiliary adhesive portion disposed between the first adhesive portion and the third adhesive portion.