An oriented electrical steel sheet comprising: the oriented electrical steel sheet includes O: 0.0020 to 0.0080wt%, Si: 2.5 to 4.0wt%, C: 0.02 to 0.10wt%, Al: 0.02 tc 0.04wt%, Mn: 0.05 to 0.20wt%, N: 0.002 to 0.012wt%, S: 0.001wt% to 0.010wt%, P: 0.01 to 0.08 wt%, and a remainder of Fe and impurities based on the entire composition 100 wt% of the electrical steel sheet; a groove existing on the surface of the electrical steel sheet; and a forsterite layer formed on a part or all of the surface of the electrical steel sheet, wherein one or more forsterite anchors having a 3D network structure which are integrally extended from the forsterite layer and formed to a base steel sheet are present on the surface of the side of the groove, wherein when a rolling direction of the electrical steel sheet is referred to as an x axis, a width direction of the electrical steel sheet is referred to as a y axis, a normal direction of an xy plane is referred to as a z axis, and the forsterite anchor having the 3D network structure which is formed to the base steel sheet is observed in an xz plane, the forsterite anchor has a hook shape or an anchor shape, two or more forsterite anchors having the 3D network structure which is formed to the base steel sheet are present within 50μm from the surface of the side of the groove, and the groove formed on the steel sheet is formed with an insulation coating directly on the steel sheet in the groove, wherein the forsterite anchor having the 3D network structure which is formed to the base steel sheet has a length of 1/3 or more of a mean thickness of the forsterite layer, and a mean thickness of the forsterite layer is 0.1 μm to 3 μm; and wherein a length in a thickness direction of the electrical steel sheet of the forsterite anchor having the 3D network structure which is formed to the base steel sheet is 0.3 to 10 μm. the oriented electrical steel sheet includes O: 0.0020 to 0.0080wt%, Si: 2.5 to 4.0wt%, C: 0.02 to 0.10wt%, Al: 0.02 tc 0.04wt%, Mn: 0.05 to 0.20wt%, N: 0.002 to 0.012wt%, S: 0.001wt% to 0.010wt%, P: 0.01 to 0.08 wt%, and a remainder of Fe and impurities based on the entire composition 100 wt% of the electrical steel sheet; a groove existing on the surface of the electrical steel sheet; and a forsterite layer formed on a part or all of the surface of the electrical steel sheet, wherein one or more forsterite anchors having a 3D network structure which are integrally extended from the forsterite layer and formed to a base steel sheet are present on the surface of the side of the groove, wherein when a rolling direction of the electrical steel sheet is referred to as an x axis, a width direction of the electrical steel sheet is referred to as a y axis, a normal direction of an xy plane is referred to as a z axis, and the forsterite anchor having the 3D network structure which is formed to the base steel sheet is observed in an xz plane, the forsterite anchor has a hook shape or an anchor shape, two or more forsterite anchors having the 3D network structure which is formed to the base steel sheet are present within 50μm from the surface of the side of the groove, and the groove formed on the steel sheet is formed with an insulation coating directly on the steel sheet in the groove, wherein the forsterite anchor having the 3D network structure which is formed to the base steel sheet has a length of 1/3 or more of a mean thickness of the forsterite layer, and a mean thickness of the forsterite layer is 0.1 μm to 3 μm; and wherein a length in a thickness direction of the electrical steel sheet of the forsterite anchor having the 3D network structure which is formed to the base steel sheet is 0.3 to 10 μm. <EOS>