An apparatus comprising a main body with an inside wall, the apparatus further comprising a slide rail locking device and a supporting bar , the slide rail locking device being for coupling the supporting bar mountable on an inside wall of the main body to a slide rail fixed to a side surface or a bottom surface of a drawer , wherein the slide rail locking device comprises: an upper locking plate located above the supporting bar , and lockable to a slide rail ; a lower locking plate located below the supporting bar ; a connection plate connecting the upper locking plate and the lower locking plate to each other; and an extended plate formed by being bulged down from the lower locking plate to face the upper locking plate ,and wherein the supporting bar includes: a plurality of horizontal supporting bars ; and a plurality of vertical supporting bars disposed perpendicular to the plurality of horizontal supporting bars , with opposite ends of the plurality of horizontal supporting bars being fixed thereto, and the horizontal supporting bars including a plurality of fixing parts (111-1) disposed in parallel with each other, with first ends thereof being mounted perpendicular to the vertical supporting bars and toward the inside of the main body , wherein a gap is formed to separate the upper locking plate , the lower locking plate , and the connection plate from the vertical supporting bar by a predetermined distance, characterized in that the slide rail locking device is formed such that the upper locking plate , the lower locking plate and the connection plate surround the fixing parts (111-1). the slide rail locking device being for coupling the supporting bar mountable on an inside wall of the main body to a slide rail fixed to a side surface or a bottom surface of a drawer , wherein the slide rail locking device comprises: an upper locking plate located above the supporting bar , and lockable to a slide rail ; a lower locking plate located below the supporting bar ; a connection plate connecting the upper locking plate and the lower locking plate to each other; and an extended plate formed by being bulged down from the lower locking plate to face the upper locking plate ,and an upper locking plate located above the supporting bar , and lockable to a slide rail ; a lower locking plate located below the supporting bar ; a connection plate connecting the upper locking plate and the lower locking plate to each other; and an extended plate formed by being bulged down from the lower locking plate to face the upper locking plate ,and wherein the supporting bar includes: a plurality of horizontal supporting bars ; and a plurality of vertical supporting bars disposed perpendicular to the plurality of horizontal supporting bars , with opposite ends of the plurality of horizontal supporting bars being fixed thereto, and a plurality of horizontal supporting bars ; and a plurality of vertical supporting bars disposed perpendicular to the plurality of horizontal supporting bars , with opposite ends of the plurality of horizontal supporting bars being fixed thereto, and the horizontal supporting bars including a plurality of fixing parts (111-1) disposed in parallel with each other, with first ends thereof being mounted perpendicular to the vertical supporting bars and toward the inside of the main body , wherein a gap is formed to separate the upper locking plate , the lower locking plate , and the connection plate from the vertical supporting bar by a predetermined distance, characterized in that the slide rail locking device is formed such that the upper locking plate , the lower locking plate and the connection plate surround the fixing parts (111-1). <EOS>