There is disclosed a refrigerator including an inner case that defines an exterior appearance of a storage space, an outer case spaced apart a predetermined distance from the inner case, a vacuum space provided between the inner case and the outer case, with being maintained vacuum, to insulate the inner case from the outer case, and a liquid-gas interchanger arranged in the vacuum space to generate heat exchange between refrigerant after exhausted from an evaporator and refrigerant before drawn into an evaporator.