An optical lens comprising: a bottom surface; a recess that is upwardly convex at a central region of the bottom surface, wherein an axial direction perpendicular to a bottom of recess and crossing the bottom of the recess in its centre (Po) is a central or an optical axis, and a first axis is a direction orthogonal to the central axis at the centre of the bottom of the recess; a light input surface at an inner surface of the recess; a first light output surface having a convex curved surface opposite to the bottom surface and the light input surface; and a second light output surface extending toward the bottom surface in a direction perpendicular to the first axis from an outer edge line of the first light output surface, wherein the bottom surface comprises a first edge adjacent to the recess and a second edge adjacent to the second light output surface; wherein an interval between the bottom surface and the first axis gradually narrows as the bottom surface gradually approaches the first edge; wherein a lower region of the light input surface is disposed lower than a straight horizontal line passing through the second edge; and wherein a convex central region of the first light output surface is overlapped with the recess along the central axis, wherein the first light input surface has a curved surface that is upwardly convex from the central region of the bottom surface in the recess, wherein the second light output surface comprises a third edge adjacent to the first light output surface, wherein a diameter of the recess gradually decreases toward the first vertex of the light input surface, wherein a depth of the recess is greater than a width of the bottom of the recess, wherein a first vertex of the light input surface is closer to a second vertex of the first light output surface than a straight horizontal line passing through the third edge of the second light output surface, wherein a straight line connecting the first edge and the second edge of the bottom surface is inclined at an angle of 5° or smaller with respect to the first axis, wherein a minimum distance between the recess and the first light output surface is 1/2 or smaller of a thickness of the second light output surface. a bottom surface; a recess that is upwardly convex at a central region of the bottom surface, wherein an axial direction perpendicular to a bottom of recess and crossing the bottom of the recess in its centre (Po) is a central or an optical axis, and a first axis is a direction orthogonal to the central axis at the centre of the bottom of the recess; a light input surface at an inner surface of the recess; a first light output surface having a convex curved surface opposite to the bottom surface and the light input surface; and a second light output surface extending toward the bottom surface in a direction perpendicular to the first axis from an outer edge line of the first light output surface, wherein the bottom surface comprises a first edge adjacent to the recess and a second edge adjacent to the second light output surface; wherein an interval between the bottom surface and the first axis gradually narrows as the bottom surface gradually approaches the first edge; wherein a lower region of the light input surface is disposed lower than a straight horizontal line passing through the second edge; and wherein a convex central region of the first light output surface is overlapped with the recess along the central axis, wherein the first light input surface has a curved surface that is upwardly convex from the central region of the bottom surface in the recess, wherein the second light output surface comprises a third edge adjacent to the first light output surface, wherein a diameter of the recess gradually decreases toward the first vertex of the light input surface, wherein a depth of the recess is greater than a width of the bottom of the recess, wherein a first vertex of the light input surface is closer to a second vertex of the first light output surface than a straight horizontal line passing through the third edge of the second light output surface, wherein a straight line connecting the first edge and the second edge of the bottom surface is inclined at an angle of 5° or smaller with respect to the first axis, wherein a minimum distance between the recess and the first light output surface is 1/2 or smaller of a thickness of the second light output surface.