A liquid crystal display element comprising: a first substrate which includes a first electrode; a second substrate which is disposed to oppose the first substrate and includes a second electrode on a surface facing the first electrode; and a liquid crystal layer which is disposed between the first substrate and the second substrate, wherein each of the first electrode and the second electrode includes a plurality of openings (12ao, 12bo) which are elongated in a first direction and are adjacent to each other along the first direction, wherein the opening of the first electrode and the opening of the second electrode have same shape and are displaced by half pitch in a second direction perpendicular to the first direction so that when a voltage is applied between the first and the second electrodes, an oblique electric field is generated, wherein when two openings of the plurality of openings (12ao, 12bo) which are adjacent to each other along the first direction are viewed, one of opening widths of opposing portions is large having a second length (Sw) and the other thereof is small having a fourth length (Sn), and wherein when the display device is placed between crossed polarizers and a voltage is applied between the first electrode and the second electrode, a dark region is generated between the two openings adjacent to each other along the first direction, characterised in that: each of said plurality of openings (12ao, 12bo) has a first rectangular region having first parallel sides of a first length (La) along the first direction and a first end line of the second length (Sw) along a second direction perpendicular to the first direction and connecting the first parallel sides, a second rectangular region having second parallel sides of a third length (Lc) along the first direction and a second end line of the fourth length (Sn) along the second direction and connecting the second parallel sides, and a trapezoidal region connecting the first and the second rectangular regions, having a first bottom of the second length (Sw) adjacent to the first rectangular region and a second bottom of the fourth length (Sn) adjacent to the second rectangular region, and having a height (Lb) along the first direction. a first substrate which includes a first electrode; a second substrate which is disposed to oppose the first substrate and includes a second electrode on a surface facing the first electrode; and a liquid crystal layer which is disposed between the first substrate and the second substrate, wherein each of the first electrode and the second electrode includes a plurality of openings (12ao, 12bo) which are elongated in a first direction and are adjacent to each other along the first direction, wherein the opening of the first electrode and the opening of the second electrode have same shape and are displaced by half pitch in a second direction perpendicular to the first direction so that when a voltage is applied between the first and the second electrodes, an oblique electric field is generated, wherein when two openings of the plurality of openings (12ao, 12bo) which are adjacent to each other along the first direction are viewed, one of opening widths of opposing portions is large having a second length (Sw) and the other thereof is small having a fourth length (Sn), and wherein when the display device is placed between crossed polarizers and a voltage is applied between the first electrode and the second electrode, a dark region is generated between the two openings adjacent to each other along the first direction, characterised in that: each of said plurality of openings (12ao, 12bo) has a first rectangular region having first parallel sides of a first length (La) along the first direction and a first end line of the second length (Sw) along a second direction perpendicular to the first direction and connecting the first parallel sides, a second rectangular region having second parallel sides of a third length (Lc) along the first direction and a second end line of the fourth length (Sn) along the second direction and connecting the second parallel sides, and a trapezoidal region connecting the first and the second rectangular regions, having a first bottom of the second length (Sw) adjacent to the first rectangular region and a second bottom of the fourth length (Sn) adjacent to the second rectangular region, and having a height (Lb) along the first direction.