A vacuum heat insulator includes inner box (403), external plate (401), and gas barrier container (402). Gas barrier container (402) includes core material (423), first member (421) that has a box shape including a first opening portion, and second member (422) that tightly closes the first opening portion. Core material (423) is disposed inside first member (421). Inner box (403) includes a second opening portion. Gas barrier container (402) is disposed inside inner box (403). The second opening portion is closed by external plate (401). First member (421) has such a shape that an outer face of first member (421) fits with an inner face of inner box (403).