A lighting device, comprising: - a light source which generates a laser ray; - a light conversion unit which includes a phosphor plate having a light incident region disposed on a first surface facing a light emitting surface of said light source and on which the laser ray is incident and a light emitting region disposed on a second surface opposite to the first surface and which outputs a converted light excited by the laser ray; - a housing which is arranged on the second surface of the light conversion unit and has an opening which exposes the light emitting region of the phosphor plate, and - a light concentrating unit disposed between the light source and the light conversion unit and concentrating the laser ray emitted from the light source toward the light conversion unit, wherein the light conversion unit further includes: - a substrate disposed on a back surface of the phosphor plate; - a short wavelength pass filter disposed between the a front surface of the substrate and the phosphor plate; and - a molding which surrounds a side surface of the phosphor plate, wherein the housing is disposed to cover a part of the second surface of the phosphor plate, and wherein the light conversion unit further comprises a collimator disposed between the light source and the light concentrating unit, characterized in that the light conversion unit further includes: - an antireflection coating disposed on a back surface of the substrate, and in that the ratio of the diameter of the light incident region of the first surface of the phosphor plate and the diameter of the light emitting region of the second surface of the phosphor plate ranges from 1: 3 and wherein a distance between the first surface and the second surface is 60 μ m. - a light source which generates a laser ray; - a light conversion unit which includes a phosphor plate having a light incident region disposed on a first surface facing a light emitting surface of said light source and on which the laser ray is incident and a light emitting region disposed on a second surface opposite to the first surface and which outputs a converted light excited by the laser ray; - a housing which is arranged on the second surface of the light conversion unit and has an opening which exposes the light emitting region of the phosphor plate, and - a light concentrating unit disposed between the light source and the light conversion unit and concentrating the laser ray emitted from the light source toward the light conversion unit, wherein the light conversion unit further includes: - a substrate disposed on a back surface of the phosphor plate; - a short wavelength pass filter disposed between the a front surface of the substrate and the phosphor plate; and - a molding which surrounds a side surface of the phosphor plate, wherein the housing is disposed to cover a part of the second surface of the phosphor plate, and wherein the light conversion unit further comprises a collimator disposed between the light source and the light concentrating unit, characterized in that the light conversion unit further includes: - an antireflection coating disposed on a back surface of the substrate, and in that the ratio of the diameter of the light incident region of the first surface of the phosphor plate and the diameter of the light emitting region of the second surface of the phosphor plate ranges from 1: 3 and wherein a distance between the first surface and the second surface is 60 μ m. - a substrate disposed on a back surface of the phosphor plate; - a short wavelength pass filter disposed between the a front surface of the substrate and the phosphor plate; and - a molding which surrounds a side surface of the phosphor plate, wherein the housing is disposed to cover a part of the second surface of the phosphor plate, and wherein the light conversion unit further comprises a collimator disposed between the light source and the light concentrating unit, characterized in that the light conversion unit further includes: - an antireflection coating disposed on a back surface of the substrate, and in that the ratio of the diameter of the light incident region of the first surface of the phosphor plate and the diameter of the light emitting region of the second surface of the phosphor plate ranges from 1: 3 and wherein a distance between the first surface and the second surface is 60 μ m. wherein the housing is disposed to cover a part of the second surface of the phosphor plate, and wherein the light conversion unit further comprises a collimator disposed between the light source and the light concentrating unit, characterized in that the light conversion unit further includes: - an antireflection coating disposed on a back surface of the substrate, and in that the ratio of the diameter of the light incident region of the first surface of the phosphor plate and the diameter of the light emitting region of the second surface of the phosphor plate ranges from 1: 3 and wherein a distance between the first surface and the second surface is 60 μ m. - an antireflection coating disposed on a back surface of the substrate, and in that the ratio of the diameter of the light incident region of the first surface of the phosphor plate and the diameter of the light emitting region of the second surface of the phosphor plate ranges from 1: 3 and wherein a distance between the first surface and the second surface is 60 μ m.