A vacuum insulation material comprising: two laminate films each having a protective layer on one side, a sealant layer on other side, and a gas barrier layer between the protective layer and the sealant layer; a core material sealed at a reduced pressure between the two laminate films disposed so that the sealant layers may be opposite to each other; and a sealing part having the sealant layers fused to each other near the peripheral edge of the two laminate films so as to surround the whole circumference of the core material, characterized in that at least the sealing part at one side of the laminate films or the sealing part positioned in one direction of the core material out of the sealing parts surrounding the core material (2is heated and pressed to a temperature for fusing the sealant layer, but not fusing the protective layer and the gas barrier layer from outside, so that a part of a resin for composing the sealant layer in a specific position may be moved to the sealant layer adjacent to a sealant layer at a specific position in a direction approaching the closes peripheral edge of the peripheral edges of the laminate film, or may be moved to the sealant layer adjacent to the sealant layer at the specific position in a reverse direction to the approaching direction, and as a result, when seen from a section being cut off on a plane perpendicular to the closest peripheral edge, as going from the closest peripheral edge to the inner circumference of the laminate film, the interval between the gas barrier layer of the laminate film in one part of the sealing part and the gas barrier layer of the other laminate film of the sealing part is changed continuously, further, in a portion changing in the interval between the gas barrier layer of the laminate film in one part of the sealing part and the gas barrier layer of the other laminate film of the sealing part, there are a plurality of thin-wall parts in which the thickness of the sealant layer between the gas barrier layer of the laminate film in one part of the sealing part and the gas barrier layer of the other laminate film of the sealing part is smaller than the total thickness of the thickness of the sealant layers between the gas barrier layer of one laminate film not heated and fused between the sealant layers and the gas barrier layer of the other laminate film not heated and fused between the sealant layers, moreover, at the inner circumferential side of two adjacent thin-wall parts out of the plurality of the thin-wall parts and the thin-wall part positioned at the inner most circumferential side out of the plurality of thin-wall parts and at the outermost circumferential side of the plurality of the thin-wall parts positioned at the outermost circumferential side, there are a plurality of thick-wall parts in which the thickness of the sealant layer between the gas barrier layer of one laminate film is greater than the total thickness of the thickness of the sealant layers between the gas barrier layer of one laminate film not heated and fused between the sealant layers and the gas barrier layer of the other laminate film not heated and fused between the sealant layers, and further, of the plurality of thin-wall parts, all sealant layers opposite to each other between two adjacent thin-wall parts are heated and fused.