A display device comprising: a first substrate; and a second substrate including one surface opposite to one surface of the first substrate, wherein the first substrate comprises a first-one portion (260, 251) that overlaps the second substrate in a thickness direction and a first-two portion that does not overlap the second substrate, the second substrate comprises a second portion (351, 360, 352) that overlaps the first substrate in the thickness direction, the first-two portion has a greater thickness than the first-one portion (260, 251), the second portion (351, 360, 352) comprises a second-one portion (360, 351) that overlaps the first-one portion (260, 251) in the thickness direction and a second-two portion disposed between the second-one portion (360, 351) and the first-two portion in a plan view, the second-two portion has a greater thickness than the second-one portion (360, 351), the second-two portion is disposed so as not to overlap the first-two portion in the thickness direction, and wherein the first-one portion (260, 251) comprises a first-one-one portion and a first-one-two portion disposed between the first-one-one portion and the first-two portion, and the first-one-one portion has a greater thickness than the first-one-two portion, and. wherein the second-one portion (360, 351) comprises a second-one-one portion disposed to overlap the first-one-one portion in the thickness direction and a second-one-two portion disposed to overlap the first-one-two portion in the thickness direction, and the second-one-one portion has a greater thickness than the second-one-two portion, and characterized in that the first-one-one portion has a thickness smaller than the thickness of the first-two portion, and the second-one-one portion has a thickness smaller than the thickness of the second-two portion. a first substrate; and a second substrate including one surface opposite to one surface of the first substrate, wherein the first substrate comprises a first-one portion (260, 251) that overlaps the second substrate in a thickness direction and a first-two portion that does not overlap the second substrate, the second substrate comprises a second portion (351, 360, 352) that overlaps the first substrate in the thickness direction, the first-two portion has a greater thickness than the first-one portion (260, 251), the second portion (351, 360, 352) comprises a second-one portion (360, 351) that overlaps the first-one portion (260, 251) in the thickness direction and a second-two portion disposed between the second-one portion (360, 351) and the first-two portion in a plan view, the second-two portion has a greater thickness than the second-one portion (360, 351), the second-two portion is disposed so as not to overlap the first-two portion in the thickness direction, and wherein the first-one portion (260, 251) comprises a first-one-one portion and a first-one-two portion disposed between the first-one-one portion and the first-two portion, and the first-one-one portion has a greater thickness than the first-one-two portion, and. wherein the second-one portion (360, 351) comprises a second-one-one portion disposed to overlap the first-one-one portion in the thickness direction and a second-one-two portion disposed to overlap the first-one-two portion in the thickness direction, and the second-one-one portion has a greater thickness than the second-one-two portion, and characterized in that the first-one-one portion has a thickness smaller than the thickness of the first-two portion, and the second-one-one portion has a thickness smaller than the thickness of the second-two portion. the first substrate comprises a first-one portion (260, 251) that overlaps the second substrate in a thickness direction and a first-two portion that does not overlap the second substrate, the second substrate comprises a second portion (351, 360, 352) that overlaps the first substrate in the thickness direction, the first-two portion has a greater thickness than the first-one portion (260, 251), the second portion (351, 360, 352) comprises a second-one portion (360, 351) that overlaps the first-one portion (260, 251) in the thickness direction and a second-two portion disposed between the second-one portion (360, 351) and the first-two portion in a plan view, the second-two portion has a greater thickness than the second-one portion (360, 351), the second-two portion is disposed so as not to overlap the first-two portion in the thickness direction, and wherein the first-one portion (260, 251) comprises a first-one-one portion and a first-one-two portion disposed between the first-one-one portion and the first-two portion, and the first-one-one portion has a greater thickness than the first-one-two portion, and. wherein the second-one portion (360, 351) comprises a second-one-one portion disposed to overlap the first-one-one portion in the thickness direction and a second-one-two portion disposed to overlap the first-one-two portion in the thickness direction, and the second-one-one portion has a greater thickness than the second-one-two portion, and characterized in that the first-one-one portion has a thickness smaller than the thickness of the first-two portion, and the second-one-one portion has a thickness smaller than the thickness of the second-two portion.