Household refrigeration appliance, having - a carcass heat-insulated with an insulation foam with an inner container, which comprises a foam-side surface facing the insulation foam and an opening and delimits a coolable interior space provided for storing food, - a refrigeration appliance for cooling the coolable interior space, and - a backing part fastened in the region of the opening and embedded in the insulation foam, wherein the inner container comprises a collar-shaped wall which projects from the foam-side surface and surrounds the opening of the inner container and which has at least one locking means and the backing part comprises at least one counter locking means which is locked with the at least one locking means for fastening the backing part in the region of the opening of the inner container, wherein in a first variant the at least one locking means is embodied as at least one closed contour in the form of an indentation and the at least one counter locking means is embodied as a locking hook or as a contour which engages in a force fit and form fit manner into the indentation, or that the at least one locking means is embodied as at least one closed contour in the form of a bulge and the at least one counter locking means is embodied as a locking hook or a contour which surrounds the bulge in a force fit and form fit manner, or in a second variant the at least one locking means is embodied as at least one closed contour in the form of a cut-out in the collar-shaped wall and the at least one counter locking means is embodied as a locking hook, characterised in that the household refrigeration appliance has an electronic or electrical component with at least one electronic or electrical part and/or electronic or electrical assembly, wherein the backing part is embodied as the electronic or electrical component or its housing. - a carcass heat-insulated with an insulation foam with an inner container, which comprises a foam-side surface facing the insulation foam and an opening and delimits a coolable interior space provided for storing food, - a refrigeration appliance for cooling the coolable interior space, and - a backing part fastened in the region of the opening and embedded in the insulation foam, wherein the inner container comprises a collar-shaped wall which projects from the foam-side surface and surrounds the opening of the inner container and which has at least one locking means and the backing part comprises at least one counter locking means which is locked with the at least one locking means for fastening the backing part in the region of the opening of the inner container, wherein in a first variant the at least one locking means is embodied as at least one closed contour in the form of an indentation and the at least one counter locking means is embodied as a locking hook or as a contour which engages in a force fit and form fit manner into the indentation, or that the at least one locking means is embodied as at least one closed contour in the form of a bulge and the at least one counter locking means is embodied as a locking hook or a contour which surrounds the bulge in a force fit and form fit manner, or in a second variant the at least one locking means is embodied as at least one closed contour in the form of a cut-out in the collar-shaped wall and the at least one counter locking means is embodied as a locking hook, characterised in that the household refrigeration appliance has an electronic or electrical component with at least one electronic or electrical part and/or electronic or electrical assembly, wherein the backing part is embodied as the electronic or electrical component or its housing.