A vacuum insulation panel, comprising: a core material; a sealing cover formed in a manner to cover the core material, and having bonding portions some parts of which are bonded to each other so as to separate the core material from the outside; and an extended insulating portion extended from the core material between the bonding portions, wherein grooves having a predetermined stepped portion are formed at the sealing cover to adjust the thickness of the extended insulating portion, wherein the thickness of the extended insulation portion is formed at a depth corresponding to the depth of the grooves, and wherein the extended insulating portion is formed of vacuum or filled with insulation material having superior insulation performance, characterised in that: the core material is formed by stacking panels woven from as thin glass fibers as possible; the sealing cover including a plurality of layers comprises: an outermost layer formed of nylon, a protective layer formed of nylon, a gas shielding layer formed of a thin aluminium sheet stacked on the bottom surface of the protective layer, the aluminium sheet having a thickness of about 7μm, and a heating-fusion bonding layer stacked on the bottom surface of the gas shielding layer and kept in contact with the core material. a core material; a sealing cover formed in a manner to cover the core material, and having bonding portions some parts of which are bonded to each other so as to separate the core material from the outside; and an extended insulating portion extended from the core material between the bonding portions, wherein grooves having a predetermined stepped portion are formed at the sealing cover to adjust the thickness of the extended insulating portion, wherein the thickness of the extended insulation portion is formed at a depth corresponding to the depth of the grooves, and wherein the extended insulating portion is formed of vacuum or filled with insulation material having superior insulation performance, characterised in that: the core material is formed by stacking panels woven from as thin glass fibers as possible; the sealing cover including a plurality of layers comprises: an outermost layer formed of nylon, a protective layer formed of nylon, a gas shielding layer formed of a thin aluminium sheet stacked on the bottom surface of the protective layer, the aluminium sheet having a thickness of about 7μm, and a heating-fusion bonding layer stacked on the bottom surface of the gas shielding layer and kept in contact with the core material. the core material is formed by stacking panels woven from as thin glass fibers as possible; the sealing cover including a plurality of layers comprises: an outermost layer formed of nylon, a protective layer formed of nylon, a gas shielding layer formed of a thin aluminium sheet stacked on the bottom surface of the protective layer, the aluminium sheet having a thickness of about 7μm, and a heating-fusion bonding layer stacked on the bottom surface of the gas shielding layer and kept in contact with the core material. an outermost layer formed of nylon, a protective layer formed of nylon, a gas shielding layer formed of a thin aluminium sheet stacked on the bottom surface of the protective layer, the aluminium sheet having a thickness of about 7μm, and a heating-fusion bonding layer stacked on the bottom surface of the gas shielding layer and kept in contact with the core material.