A cushion sheet suitable for a display device including a display panel and a housing, the cushion sheet comprising: a cushion film; an adhesive layer deposited on at least one surface of the cushion film; and a plurality of bubble discharge members (310, 320) consisting in openings extending through the cushion film and the adhesive layer for removing air bubbles generated at adhesion to the display panel or to the housing of the display device, the openings having a first end (310a, 320a) at a first surface of the cushion sheet and a second end (310b, 320b) at a second surface of the cushion sheet opposed to the first surface; and wherein each of the plurality of bubble discharge members (310, 320) are inclined at a penetrating angle (α, β) within the cushion sheet, the penetrating angle (α, β) being an angle formed between a first line connecting the first end (310a, 320a) of the bubble discharge members to the respective second end (310b, 320b) and a second line perpendicular to the first surface and the second surface of the cushion sheet, the second line extending from the first end (310a, 320a) of the respective bubble discharge member to the first surface of the cushion sheet, and wherein: each of the plurality of bubble discharge members consists in a slit with a rectangular section extending through the cushion sheet and the penetrating angle of each opening is represented by α and satisfies the following equation, tan α ≥ W / T, wherein W indicates the width of the opening and T indicates the thickness of the cushion sheet, or each of the plurality of bubble discharge members consists in a circular through-hole extending through the cushion sheet and the penetrating angle of each through-hole is represented by β and satisfies the following equation, tan β ≥ D / T, wherein D indicates the diameter of the through-hole and T indicates the thickness of the cushion sheet, and characterized in that the penetrating angle (α, β) is more than 30 degrees. a cushion film; an adhesive layer deposited on at least one surface of the cushion film; and a plurality of bubble discharge members (310, 320) consisting in openings extending through the cushion film and the adhesive layer for removing air bubbles generated at adhesion to the display panel or to the housing of the display device, the openings having a first end (310a, 320a) at a first surface of the cushion sheet and a second end (310b, 320b) at a second surface of the cushion sheet opposed to the first surface; and each of the plurality of bubble discharge members consists in a slit with a rectangular section extending through the cushion sheet and the penetrating angle of each opening is represented by α and satisfies the following equation, tan α ≥ W / T, wherein W indicates the width of the opening and T indicates the thickness of the cushion sheet, or each of the plurality of bubble discharge members consists in a circular through-hole extending through the cushion sheet and the penetrating angle of each through-hole is represented by β and satisfies the following equation, tan β ≥ D / T, wherein D indicates the diameter of the through-hole and T indicates the thickness of the cushion sheet, and characterized in that the penetrating angle (α, β) is more than 30 degrees. wherein W indicates the width of the opening and T indicates the thickness of the cushion sheet, or each of the plurality of bubble discharge members consists in a circular through-hole extending through the cushion sheet and the penetrating angle of each through-hole is represented by β and satisfies the following equation, tan β ≥ D / T, wherein D indicates the diameter of the through-hole and T indicates the thickness of the cushion sheet, and characterized in that the penetrating angle (α, β) is more than 30 degrees.