A lighting device comprising: at least one light source; and a lens configured to direct light emitted from the at least one light source, the lens having a concave component with an inner bottom face and an inner face (102ea, 102eb), an emission face located on an opposite side from the concave component, and an outer face (102ha, 102hb) located to the side of the concave component; wherein the inner face (102ea, 102eb) forms a convex face that faces toward inside of the concave component; the outer face (102ha, 102hb) is configured to reflect the light that has entered the lens through the inner face (102ea, 102eb) toward the emission face, the outer face (102ha, 102hb) being oriented such that the light that has entered the lens through the inner face (102ea, 102eb) is reflected toward the side portion, the outer face (102ha, 102hb) being inclined in a tapered shape such that the lens diverges toward the emission face, and the outer face (102ha, 102hb) forming a convex face that faces toward outside of the lens; the at least one light source and the lens are configured such that the light emitted from the at least one light source is incident on the concave component; the emission face has a central portion that is arranged such that the light that has entered the lens through the inner bottom face is incident on the central portion, and a side portion that is located to the side of the central portion, the side portion being oriented such that the light reflected by the outer face (102ha, 102hb) is refracted substantially in the same direction as the light emitted from the central portion; characterized in that a boundary (102fa, 102fb) between the inner bottom face and the inner face (102ea, 102eb) is retracted relative to a protruding end of the inner face (102ea, 102eb) such that the light incident on the concave component from the at least one light source is not directly incident on the boundary; the lens further has a concaved bottom component (402ia, 402ib) between the concave component and the outer face (102ha, 102hb); and the concave bottom component has a surface that is configured to reflect the light that has entered the lens through the inner face (102ea, 102eb) toward the outer face (102ha, 102hb). at least one light source; and a lens configured to direct light emitted from the at least one light source, the lens having a concave component with an inner bottom face and an inner face (102ea, 102eb), an emission face located on an opposite side from the concave component, and an outer face (102ha, 102hb) located to the side of the concave component; a concave component with an inner bottom face and an inner face (102ea, 102eb), an emission face located on an opposite side from the concave component, and an outer face (102ha, 102hb) located to the side of the concave component; wherein the inner face (102ea, 102eb) forms a convex face that faces toward inside of the concave component; the outer face (102ha, 102hb) is configured to reflect the light that has entered the lens through the inner face (102ea, 102eb) toward the emission face, the outer face (102ha, 102hb) being oriented such that the light that has entered the lens through the inner face (102ea, 102eb) is reflected toward the side portion, the outer face (102ha, 102hb) being inclined in a tapered shape such that the lens diverges toward the emission face, and the outer face (102ha, 102hb) forming a convex face that faces toward outside of the lens; the outer face (102ha, 102hb) being oriented such that the light that has entered the lens through the inner face (102ea, 102eb) is reflected toward the side portion, the outer face (102ha, 102hb) being inclined in a tapered shape such that the lens diverges toward the emission face, and the outer face (102ha, 102hb) forming a convex face that faces toward outside of the lens; the at least one light source and the lens are configured such that the light emitted from the at least one light source is incident on the concave component; the emission face has a central portion that is arranged such that the light that has entered the lens through the inner bottom face is incident on the central portion, and a side portion that is located to the side of the central portion, the side portion being oriented such that the light reflected by the outer face (102ha, 102hb) is refracted substantially in the same direction as the light emitted from the central portion; a central portion that is arranged such that the light that has entered the lens through the inner bottom face is incident on the central portion, and a side portion that is located to the side of the central portion, the side portion being oriented such that the light reflected by the outer face (102ha, 102hb) is refracted substantially in the same direction as the light emitted from the central portion; characterized in that a boundary (102fa, 102fb) between the inner bottom face and the inner face (102ea, 102eb) is retracted relative to a protruding end of the inner face (102ea, 102eb) such that the light incident on the concave component from the at least one light source is not directly incident on the boundary; the lens further has a concaved bottom component (402ia, 402ib) between the concave component and the outer face (102ha, 102hb); and the concave bottom component has a surface that is configured to reflect the light that has entered the lens through the inner face (102ea, 102eb) toward the outer face (102ha, 102hb).