A liquid crystal display device of the multi-domain vertical alignment mode comprising: a first substrate including a plurality of unit regions; a unit electrode portion disposed on the first substrate in each unit region; an opposed electrode facing the unit electrode portion; a liquid crystal layer including a plurality of liquid crystal molecules interposed between the unit electrode portion and the opposed electrode; wherein the unit region comprises a plurality of subregions (A1, A2, A3, A4) at which the liquid crystal molecules are tilted in different directions (a1, a2, a3, a4) from each other when an electric field is applied to the liquid crystal layer through the unit electrode portion and the opposed electrode; the liquid crystal display device further comprising: a protrusion interposed between the first substrate and the liquid crystal layer and protruded toward the liquid crystal layer, wherein the protrusion comprises, in planar view: a pair of horizontal portions (261a, 261a) facing each other with respect to a center of the unit electrode portion and including a side parallel to a first direction; characterized in that the protrusion further comprises, in planar view: a pair of vertical portions (261b, 261b) facing each other with respect to the center of the unit electrode portion and including a side parallel to a second direction different from the first direction; and at least one corner portion interposed between a horizontal portion and a vertical portion that are adjacent to each other, said corner portion including a first oblique side (Ea) extending in an oblique direction with respect to the first and second directions; wherein, in cross-sectional view, the corner portion of the protrusion includes a first lateral surface (Sa) inclined with respect to a bottom surface of the protrusion, the oblique side (Ea) of the corner portion corresponding to a bottom side of the first lateral surface (Sa) of the corner portion, and the liquid crystal molecules disposed on the first lateral surface (Sa) have a pretilt in a direction in which the liquid crystal molecules are to be tilted in the subregions (A1, A2, A3, A4) adjacent to said corner portions. a first substrate including a plurality of unit regions; a unit electrode portion disposed on the first substrate in each unit region; an opposed electrode facing the unit electrode portion; a liquid crystal layer including a plurality of liquid crystal molecules interposed between the unit electrode portion and the opposed electrode; wherein the unit region comprises a plurality of subregions (A1, A2, A3, A4) at which the liquid crystal molecules are tilted in different directions (a1, a2, a3, a4) from each other when an electric field is applied to the liquid crystal layer through the unit electrode portion and the opposed electrode; the liquid crystal display device further comprising: a protrusion interposed between the first substrate and the liquid crystal layer and protruded toward the liquid crystal layer, wherein the protrusion comprises, in planar view: a pair of horizontal portions (261a, 261a) facing each other with respect to a center of the unit electrode portion and including a side parallel to a first direction; characterized in that the protrusion further comprises, in planar view: a pair of vertical portions (261b, 261b) facing each other with respect to the center of the unit electrode portion and including a side parallel to a second direction different from the first direction; and at least one corner portion interposed between a horizontal portion and a vertical portion that are adjacent to each other, said corner portion including a first oblique side (Ea) extending in an oblique direction with respect to the first and second directions; a protrusion interposed between the first substrate and the liquid crystal layer and protruded toward the liquid crystal layer, wherein the protrusion comprises, in planar view: a pair of horizontal portions (261a, 261a) facing each other with respect to a center of the unit electrode portion and including a side parallel to a first direction; characterized in that the protrusion further comprises, in planar view: a pair of vertical portions (261b, 261b) facing each other with respect to the center of the unit electrode portion and including a side parallel to a second direction different from the first direction; and at least one corner portion interposed between a horizontal portion and a vertical portion that are adjacent to each other, said corner portion including a first oblique side (Ea) extending in an oblique direction with respect to the first and second directions; a pair of vertical portions (261b, 261b) facing each other with respect to the center of the unit electrode portion and including a side parallel to a second direction different from the first direction; and at least one corner portion interposed between a horizontal portion and a vertical portion that are adjacent to each other, said corner portion including a first oblique side (Ea) extending in an oblique direction with respect to the first and second directions; wherein, in cross-sectional view, the corner portion of the protrusion includes a first lateral surface (Sa) inclined with respect to a bottom surface of the protrusion, the oblique side (Ea) of the corner portion corresponding to a bottom side of the first lateral surface (Sa) of the corner portion, and the liquid crystal molecules disposed on the first lateral surface (Sa) have a pretilt in a direction in which the liquid crystal molecules are to be tilted in the subregions (A1, A2, A3, A4) adjacent to said corner portions.