To provide a vacuum heat insulating material having good heat insulating characteristics and capable of forming a corner part with high reliability. The vacuum heat insulating material includes a core material including an inorganic fiber assembly, and an outer covering member covering at least one surface of the core material, the inside of which is decompressed and sealed, in which the outer covering member includes an outermost resin layer and radiation prevention layers positioned inside the resin layer, in which the radiation prevention layers have an overlapping part where at least two or more radiation prevention layers are stacked at apart thereof.