A light emitting module comprising: a light emitting diode chip; and a lens dispersing luminous flux of light emitted from the light emitting diode chip in a viewing angle wider than that of light emitted from the light emitting diode chip, wherein the lens includes: a lower surface having a disk-shaped surface and a concave portion disposed in a central portion of the lower surface and surrounded by the disk-shaped surface, wherein light emitted from the light emitting diode chip is incident into the concave portion; an upper surface from which the light incident on the concave portion is emitted; and wherein the upper surface includes a first concave surface positioned in a central axis thereof and a convex surface extending from the first concave surface; wherein the concave portion includes a lateral surface and an upper end surface, wherein the lateral surface extends from the upper end surface to an entrance of the concave portion, wherein the closer to the upper end surface a point of the lateral surface is, the closer to the central axis it is, and wherein the upper end surface is positioned in a region narrower than the entrance region of the concave portion, and characterized in that the upper end surface comprises an upwardly convex surface in the vicinity of the central axis and a downwardly convex surface surrounding the upwardly convex surface. a light emitting diode chip; and a lens dispersing luminous flux of light emitted from the light emitting diode chip in a viewing angle wider than that of light emitted from the light emitting diode chip, wherein the lens includes: a lower surface having a disk-shaped surface and a concave portion disposed in a central portion of the lower surface and surrounded by the disk-shaped surface, wherein light emitted from the light emitting diode chip is incident into the concave portion; an upper surface from which the light incident on the concave portion is emitted; and wherein the upper surface includes a first concave surface positioned in a central axis thereof and a convex surface extending from the first concave surface; wherein the concave portion includes a lateral surface and an upper end surface, wherein the lateral surface extends from the upper end surface to an entrance of the concave portion, wherein the closer to the upper end surface a point of the lateral surface is, the closer to the central axis it is, and wherein the upper end surface is positioned in a region narrower than the entrance region of the concave portion, and characterized in that the upper end surface comprises an upwardly convex surface in the vicinity of the central axis and a downwardly convex surface surrounding the upwardly convex surface. a lower surface having a disk-shaped surface and a concave portion disposed in a central portion of the lower surface and surrounded by the disk-shaped surface, wherein light emitted from the light emitting diode chip is incident into the concave portion; an upper surface from which the light incident on the concave portion is emitted; and wherein the upper surface includes a first concave surface positioned in a central axis thereof and a convex surface extending from the first concave surface; wherein the concave portion includes a lateral surface and an upper end surface, wherein the lateral surface extends from the upper end surface to an entrance of the concave portion, wherein the closer to the upper end surface a point of the lateral surface is, the closer to the central axis it is, and wherein the upper end surface is positioned in a region narrower than the entrance region of the concave portion, and characterized in that the upper end surface comprises an upwardly convex surface in the vicinity of the central axis and a downwardly convex surface surrounding the upwardly convex surface.