A refrigerator comprising: a heat insulating case body and a door, the heat insulating case body including an inner case, an outer case and a heat insulating material filled between the inner case and the outer case, the heat insulating case body being opened on a front side, the door being capable of closing an opening of the heat insulating case body, wherein the door includes a flat-plate-shaped outer plate, a flat-plate-shaped inner plate arranged in parallel with the outer plate, a vacuum heat insulating material arranged to be interposed between the outer plate and the inner plate, and a knob attached to the outer plate, wherein an edge of the vacuum heat insulating material extends to a position closer to an edge of the outer plate than a position of a grip of the knob, characterized in that the knob is attached to the outer plate by an attaching member (40,41) penetrating a flat plate portion of the outer plate, wherein the attaching member includes a boss and a screw, wherein the boss includes a ring portion, a cylindrical portion standing forward from an inner rim of the ring portion, a circular-plate-shaped bordering portion for closing an end portion of the cylindrical portion, and a screw hole provided at a center of the bordering portion, wherein an opening, in which the cylindrical portion of the boss is inserted, is formed at a position in the outer plate, which a leg of the knob borders, wherein the knob has a groove in which the cylindrical portion of the boss is inserted and which is formed at an end portion of the leg, the knob is fixed by the screw via the boss, and a head of the screw is positioned inside the cylindrical portion of the boss in a state that the knob is attached to the outer plate, and wherein the head of the screw and the vacuum heat insulating material are spaced apart from each other in a state that the knob is attached to the outer plate by the attaching member (40,41). a heat insulating case body and a door, the heat insulating case body including an inner case, an outer case and a heat insulating material filled between the inner case and the outer case, the heat insulating case body being opened on a front side, the door being capable of closing an opening of the heat insulating case body, wherein the door includes a flat-plate-shaped outer plate, a flat-plate-shaped inner plate arranged in parallel with the outer plate, a vacuum heat insulating material arranged to be interposed between the outer plate and the inner plate, and a knob attached to the outer plate, wherein an edge of the vacuum heat insulating material extends to a position closer to an edge of the outer plate than a position of a grip of the knob, characterized in that the knob is attached to the outer plate by an attaching member (40,41) penetrating a flat plate portion of the outer plate, wherein the attaching member includes a boss and a screw, wherein the boss includes a ring portion, a cylindrical portion standing forward from an inner rim of the ring portion, a circular-plate-shaped bordering portion for closing an end portion of the cylindrical portion, and a screw hole provided at a center of the bordering portion, wherein an opening, in which the cylindrical portion of the boss is inserted, is formed at a position in the outer plate, which a leg of the knob borders, wherein the knob has a groove in which the cylindrical portion of the boss is inserted and which is formed at an end portion of the leg, the knob is fixed by the screw via the boss, and a head of the screw is positioned inside the cylindrical portion of the boss in a state that the knob is attached to the outer plate, and wherein the head of the screw and the vacuum heat insulating material are spaced apart from each other in a state that the knob is attached to the outer plate by the attaching member (40,41).