A light emitting device comprising: a light emitting chip; and an optical lens (2,3,4,5) on the light emitting chip, wherein the optical lens (2,3,4,5) comprises: an incident surface (21,31,41,51) into which a light emitted from the light emitting chip is incident; a recess portion (24,34,44,54) opposite to the incident surface and recessed in a direction of the incident surface (21,31,41,51); an exit surface (22,32,42,52) disposed at a peripheral part of the recess portion (24,34,44,54) to output a light incident through the incident surface (21,31,41,51); and a convex portion (25,35,45,55) protruding between the recess portion (24,34,44,54) and the exit surface (22,32,42,52) and connected with at least one of the recess portion (24,34,44,54) and the exit surface (22,32,42,52) through an inflection point; characterized in that the light emitting device comprises a reflective member on the recess portion (24,34,44,54) and in contact with a surfaces of the recess portion (24,34,44,54) and the convex portion (25,35,45,55), and wherein the convex portion (25,35,45,55) is located inward of a straight line ranging from the light emitting chip to a first inflection point provided at an outermost portion of the recess portion (24,34,44,54), wherein the recess portion (24,34,44,54) includes a first total-reflection surface (24A,34A,44A,54A) close to the incident surface, wherein the first total-reflection surface (24A,34A,44A,54A) has a concave curved surface toward the light emitting chip, wherein the convex portion (25,35,45,55) is formed with a convex curved surface from a second inflection point of the exit surface (22,32,42,52) adjacent to the recess portion (24,34,44,54). a light emitting chip; and an optical lens (2,3,4,5) on the light emitting chip, wherein the optical lens (2,3,4,5) comprises: an incident surface (21,31,41,51) into which a light emitted from the light emitting chip is incident; a recess portion (24,34,44,54) opposite to the incident surface and recessed in a direction of the incident surface (21,31,41,51); an exit surface (22,32,42,52) disposed at a peripheral part of the recess portion (24,34,44,54) to output a light incident through the incident surface (21,31,41,51); and a convex portion (25,35,45,55) protruding between the recess portion (24,34,44,54) and the exit surface (22,32,42,52) and connected with at least one of the recess portion (24,34,44,54) and the exit surface (22,32,42,52) through an inflection point; characterized in that the light emitting device comprises a reflective member on the recess portion (24,34,44,54) and in contact with a surfaces of the recess portion (24,34,44,54) and the convex portion (25,35,45,55), and wherein the convex portion (25,35,45,55) is located inward of a straight line ranging from the light emitting chip to a first inflection point provided at an outermost portion of the recess portion (24,34,44,54), wherein the recess portion (24,34,44,54) includes a first total-reflection surface (24A,34A,44A,54A) close to the incident surface, wherein the first total-reflection surface (24A,34A,44A,54A) has a concave curved surface toward the light emitting chip, wherein the convex portion (25,35,45,55) is formed with a convex curved surface from a second inflection point of the exit surface (22,32,42,52) adjacent to the recess portion (24,34,44,54). an incident surface (21,31,41,51) into which a light emitted from the light emitting chip is incident; a recess portion (24,34,44,54) opposite to the incident surface and recessed in a direction of the incident surface (21,31,41,51); an exit surface (22,32,42,52) disposed at a peripheral part of the recess portion (24,34,44,54) to output a light incident through the incident surface (21,31,41,51); and a convex portion (25,35,45,55) protruding between the recess portion (24,34,44,54) and the exit surface (22,32,42,52) and connected with at least one of the recess portion (24,34,44,54) and the exit surface (22,32,42,52) through an inflection point; characterized in that the light emitting device comprises a reflective member on the recess portion (24,34,44,54) and in contact with a surfaces of the recess portion (24,34,44,54) and the convex portion (25,35,45,55), and wherein the convex portion (25,35,45,55) is located inward of a straight line ranging from the light emitting chip to a first inflection point provided at an outermost portion of the recess portion (24,34,44,54), wherein the recess portion (24,34,44,54) includes a first total-reflection surface (24A,34A,44A,54A) close to the incident surface, wherein the first total-reflection surface (24A,34A,44A,54A) has a concave curved surface toward the light emitting chip, wherein the convex portion (25,35,45,55) is formed with a convex curved surface from a second inflection point of the exit surface (22,32,42,52) adjacent to the recess portion (24,34,44,54).