A refrigerator apparatus comprising: a cabinet having an outer case to form outer appearance of the refrigerator and an inner case to define an inner space, the inner case having a case opening; a lighting device mounted on the inner case for illuminating light through the case opening, wherein the lighting device includes: a lamp case mounted on the inner case and having a cavity defined therein at a position which allows the cavity to communicate with the case opening; a light-emitting unit accommodated in the cavity, wherein the light-emitting unit is disposed spaced apart from the case opening along the inner case, and wherein the light-emitting unit emits light toward an inner surface of the cavity; and a cover coupled with the lamp case to cover the case opening, wherein the light emitted from the light-emitting unit is reflected by the inner surface of the cavity and then radiated toward the interior space through the cover, wherein the cover comprises: a light-emission portion having a shape for blocking the case opening and transmitting therethrough light reflected from the cavity; and characterized by a step portion extended from one end of the light-emission portion and covered by the inner case, wherein the light-emitting unit is mounted on the step portion such that the light-emitting unit is detachable together with the cover while being coupled with the cover when the cover is separated from the lamp case. a cabinet having an outer case to form outer appearance of the refrigerator and an inner case to define an inner space, the inner case having a case opening; a lighting device mounted on the inner case for illuminating light through the case opening, wherein the lighting device includes: a lamp case mounted on the inner case and having a cavity defined therein at a position which allows the cavity to communicate with the case opening; a light-emitting unit accommodated in the cavity, wherein the light-emitting unit is disposed spaced apart from the case opening along the inner case, and wherein the light-emitting unit emits light toward an inner surface of the cavity; and a cover coupled with the lamp case to cover the case opening, wherein the light emitted from the light-emitting unit is reflected by the inner surface of the cavity and then radiated toward the interior space through the cover, wherein the cover comprises: a light-emission portion having a shape for blocking the case opening and transmitting therethrough light reflected from the cavity; and characterized by a step portion extended from one end of the light-emission portion and covered by the inner case, wherein the light-emitting unit is mounted on the step portion such that the light-emitting unit is detachable together with the cover while being coupled with the cover when the cover is separated from the lamp case. a lamp case mounted on the inner case and having a cavity defined therein at a position which allows the cavity to communicate with the case opening; a light-emitting unit accommodated in the cavity, wherein the light-emitting unit is disposed spaced apart from the case opening along the inner case, and wherein the light-emitting unit emits light toward an inner surface of the cavity; and a cover coupled with the lamp case to cover the case opening, wherein the light emitted from the light-emitting unit is reflected by the inner surface of the cavity and then radiated toward the interior space through the cover, wherein the cover comprises: a light-emission portion having a shape for blocking the case opening and transmitting therethrough light reflected from the cavity; and characterized by a step portion extended from one end of the light-emission portion and covered by the inner case, wherein the light-emitting unit is mounted on the step portion such that the light-emitting unit is detachable together with the cover while being coupled with the cover when the cover is separated from the lamp case. a light-emission portion having a shape for blocking the case opening and transmitting therethrough light reflected from the cavity; and characterized by a step portion extended from one end of the light-emission portion and covered by the inner case, wherein the light-emitting unit is mounted on the step portion such that the light-emitting unit is detachable together with the cover while being coupled with the cover when the cover is separated from the lamp case.