A refrigerator comprising: a cabinet having a storage compartment; a door (121, 122) connected to the cabinet, and configured to open and close the storage compartment; a sterilizing device installed at a wall surface of the storage compartment; and a fan installed at the wall surface of the storage compartment, and configured to enable air in the storage compartment to pass through the sterilizing device and then to be discharged again to the storage compartment, wherein the sterilizing device comprises: a case (24, 26, 28); a light source assembly which is installed inside the case (24, 26, 28) and configured to emit visible rays; and a filter assembly comprising: a photocatalytic filter (251, 254) installed inside the case (24, 26, 28) corresponding to a front of the light source assembly and configured to react with the visible rays emitted from the light source assembly to remove germs; and a deodorizing filter (252, 253) configured to absorb odor contained in the air passing through the photocatalytic filter (251, 254), wherein the light source assembly comprises: a substrate portion; and a plurality of light emitting elements which are arranged on the substrate portion at predetermined intervals to discharge the visible rays; characterized in that said filter assembly is of a rectangular shape, said substrate portion is disposed in parallel to the filter assembly and said light assembly is disposed to be inclined diagonally with respect to a horizonal side of the filter assembly. a cabinet having a storage compartment; a door (121, 122) connected to the cabinet, and configured to open and close the storage compartment; a sterilizing device installed at a wall surface of the storage compartment; and a fan installed at the wall surface of the storage compartment, and configured to enable air in the storage compartment to pass through the sterilizing device and then to be discharged again to the storage compartment, wherein the sterilizing device comprises: a case (24, 26, 28); a light source assembly which is installed inside the case (24, 26, 28) and configured to emit visible rays; and a filter assembly comprising: a photocatalytic filter (251, 254) installed inside the case (24, 26, 28) corresponding to a front of the light source assembly and configured to react with the visible rays emitted from the light source assembly to remove germs; and a deodorizing filter (252, 253) configured to absorb odor contained in the air passing through the photocatalytic filter (251, 254), wherein the light source assembly comprises: a substrate portion; and a plurality of light emitting elements which are arranged on the substrate portion at predetermined intervals to discharge the visible rays; characterized in that said filter assembly is of a rectangular shape, said substrate portion is disposed in parallel to the filter assembly and said light assembly is disposed to be inclined diagonally with respect to a horizonal side of the filter assembly. a case (24, 26, 28); a light source assembly which is installed inside the case (24, 26, 28) and configured to emit visible rays; and a filter assembly comprising: a photocatalytic filter (251, 254) installed inside the case (24, 26, 28) corresponding to a front of the light source assembly and configured to react with the visible rays emitted from the light source assembly to remove germs; and a deodorizing filter (252, 253) configured to absorb odor contained in the air passing through the photocatalytic filter (251, 254), a photocatalytic filter (251, 254) installed inside the case (24, 26, 28) corresponding to a front of the light source assembly and configured to react with the visible rays emitted from the light source assembly to remove germs; and a deodorizing filter (252, 253) configured to absorb odor contained in the air passing through the photocatalytic filter (251, 254), wherein the light source assembly comprises: a substrate portion; and a plurality of light emitting elements which are arranged on the substrate portion at predetermined intervals to discharge the visible rays; characterized in that said filter assembly is of a rectangular shape, said substrate portion is disposed in parallel to the filter assembly and said light assembly is disposed to be inclined diagonally with respect to a horizonal side of the filter assembly. a substrate portion; and a plurality of light emitting elements which are arranged on the substrate portion at predetermined intervals to discharge the visible rays; characterized in that said filter assembly is of a rectangular shape, said substrate portion is disposed in parallel to the filter assembly and said light assembly is disposed to be inclined diagonally with respect to a horizonal side of the filter assembly.