An electronic device includes a first electrical element, a heat dissipation sheet having a heat diffusion member for diffusing the heat generated from the first electrical element, and an anti-shock member arranged to be stacked with at least a part of the heat diffusion member; and a bracket which provides a space for accommodating the heat dissipation sheet. The heat dissipation sheet includes a first area, a second area, and a third area arranged between the first area and the second area.