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 is the minimum at the first edge and is the maximum at the second 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 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 the first vertex of the light input surface is closer to a second vertex of the first light output surface than a straight horizontal line extending from the third edge of the second light output surface, wherein an angle (θ23) between a straight line crossing the central axis and the second edge of the bottom surface and the first axis is 5° or less, wherein the minimum distance between the recess and the first light output surface is greater than an interval between the second edge and the first axis and less than or equal to three times the interval. 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 is the minimum at the first edge and is the maximum at the second 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 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 the first vertex of the light input surface is closer to a second vertex of the first light output surface than a straight horizontal line extending from the third edge of the second light output surface, wherein an angle (θ23) between a straight line crossing the central axis and the second edge of the bottom surface and the first axis is 5° or less, wherein the minimum distance between the recess and the first light output surface is greater than an interval between the second edge and the first axis and less than or equal to three times the interval.