A refrigerator comprising: a heat insulation box defining a storage compartment therein and including: an outer box having a left side plate, a right side plate, a ceiling plate, a bottom plate and a rear plate; an inner box having a left side plate corresponding to the left side plate of the outer box, a right side plate corresponding to the right side plate of the outer box, a ceiling plate corresponding to the ceiling plate of the outer box, a bottom plate corresponding to the bottom plate of the outer box, and a rear plate corresponding to the rear plate of the outer box; and a heat insulator disposed between the inner box and the outer box to constitute heat insulating walls; an air duct provided in an inner interior of the storage compartment of the heat insulation box and having an interior in which are disposed a cooler (17,18) as a constituent element of a refrigerating cycle for supplying cold air into the storage compartment, and a blast fan (31, 39); an accommodation recess formed in the inner box and protruding inward of the inner box; and piping (65,34) disposed in the accommodation recess, wherein the accommodation recess is filled with a foam insulation (71,71a-i), and wherein the heat insulator disposed between the inner box and the outer box comprises a vacuum insulation panel and the foam insulation located partially between the inner box and the vacuum insulation panel so as to serve as a bonding agent, the accommodation recess comprises a chamfered portion formed at a corner which is made between the rear plate of the inner box and at least one of the left side plate, the right side plate and the ceiling plate of the inner box, respectively, and the piping (65,34) is disposed in the chamfered portion, characterized in that in a rear heat insulating wall the inner box abuts against the surface of the vacuum insulation panel, the accommodation recess comprises a further recess (64;76,77) which is formed at the rear plate of the inner box and is recessed inward of the inner box and which has a proximal end that is located at the chamfered portion to be continuous between the side plates (50,56;51,57) of the inner and outer box (3,2). a heat insulation box defining a storage compartment therein and including: an outer box having a left side plate, a right side plate, a ceiling plate, a bottom plate and a rear plate; an inner box having a left side plate corresponding to the left side plate of the outer box, a right side plate corresponding to the right side plate of the outer box, a ceiling plate corresponding to the ceiling plate of the outer box, a bottom plate corresponding to the bottom plate of the outer box, and a rear plate corresponding to the rear plate of the outer box; and a heat insulator disposed between the inner box and the outer box to constitute heat insulating walls; an outer box having a left side plate, a right side plate, a ceiling plate, a bottom plate and a rear plate; an inner box having a left side plate corresponding to the left side plate of the outer box, a right side plate corresponding to the right side plate of the outer box, a ceiling plate corresponding to the ceiling plate of the outer box, a bottom plate corresponding to the bottom plate of the outer box, and a rear plate corresponding to the rear plate of the outer box; and a heat insulator disposed between the inner box and the outer box to constitute heat insulating walls; an air duct provided in an inner interior of the storage compartment of the heat insulation box and having an interior in which are disposed a cooler (17,18) as a constituent element of a refrigerating cycle for supplying cold air into the storage compartment, and a blast fan (31, 39); an accommodation recess formed in the inner box and protruding inward of the inner box; and piping (65,34) disposed in the accommodation recess, wherein the accommodation recess is filled with a foam insulation (71,71a-i), and wherein the heat insulator disposed between the inner box and the outer box comprises a vacuum insulation panel and the foam insulation located partially between the inner box and the vacuum insulation panel so as to serve as a bonding agent, the accommodation recess comprises a chamfered portion formed at a corner which is made between the rear plate of the inner box and at least one of the left side plate, the right side plate and the ceiling plate of the inner box, respectively, and the piping (65,34) is disposed in the chamfered portion, characterized in that in a rear heat insulating wall the inner box abuts against the surface of the vacuum insulation panel, the accommodation recess comprises a further recess (64;76,77) which is formed at the rear plate of the inner box and is recessed inward of the inner box and which has a proximal end that is located at the chamfered portion to be continuous between the side plates (50,56;51,57) of the inner and outer box (3,2).