A liquid crystal display comprising: a liquid crystal panel; a light source provided at one side of a lower portion of the liquid crystal panel to output light; a light guide plate provided at one side of the light source to guide the light to the liquid crystal panel; and at least one prism sheet provided above the light guide plate to collect the light, the prism sheet comprising: a base including a front surface (141 a) and a rear surface facing the front surface (141 a); and a plurality of prism mountains integrally formed with the base on the rear surface (141 b) of the base, wherein at least one of the plurality of prism mountains comprises: a plurality of light incidence surfaces (344, 345) to receive light; and a reflective surface adjacent to one of the plurality of light incidence surfaces (344, 345) to reflect the light, wherein a vertical angle of the at least one prism mountain formed between the reflective surface and the light incidence surface adjacent to the reflective surface, is in a range of about 70° to about 100°, and wherein the at least one prism mountain comprises first and second light incidence surfaces (344; 345) each having a flat plane, wherein the first light incidence surface is connected to the second light incidence surface; characterized in that the first light incidence surface is connected to the second light incidence surface through a curved surface interposed between the first and second light incidence surfaces (344; 345); and the reflective surface is a curved surface. a liquid crystal panel; a light source provided at one side of a lower portion of the liquid crystal panel to output light; a light guide plate provided at one side of the light source to guide the light to the liquid crystal panel; and at least one prism sheet provided above the light guide plate to collect the light, the prism sheet comprising: a base including a front surface (141 a) and a rear surface facing the front surface (141 a); and a plurality of prism mountains integrally formed with the base on the rear surface (141 b) of the base, wherein at least one of the plurality of prism mountains comprises: a plurality of light incidence surfaces (344, 345) to receive light; and a base including a front surface (141 a) and a rear surface facing the front surface (141 a); and a plurality of prism mountains integrally formed with the base on the rear surface (141 b) of the base, wherein at least one of the plurality of prism mountains comprises: a plurality of light incidence surfaces (344, 345) to receive light; and a plurality of light incidence surfaces (344, 345) to receive light; and a reflective surface adjacent to one of the plurality of light incidence surfaces (344, 345) to reflect the light, wherein a vertical angle of the at least one prism mountain formed between the reflective surface and the light incidence surface adjacent to the reflective surface, is in a range of about 70° to about 100°, and wherein a vertical angle of the at least one prism mountain formed between the reflective surface and the light incidence surface adjacent to the reflective surface, is in a range of about 70° to about 100°, and wherein the at least one prism mountain comprises first and second light incidence surfaces (344; 345) each having a flat plane, wherein the first light incidence surface is connected to the second light incidence surface; characterized in that the first light incidence surface is connected to the second light incidence surface through a curved surface interposed between the first and second light incidence surfaces (344; 345); and the reflective surface is a curved surface.