A cooling storage cabinet comprising: a storage cabinet body having a side face; a drain head for draining internal drained water including defrost water to the outside, the drain head protruding from the side face of the storage cabinet body; a vaporizing receptacle for collecting the internal drained water drained from the drain head, the vaporizing receptacle being disposed below the drain head and having a face opposed to the side face of the storage cabinet body; and a heater for vaporizing the drained water; characterized in that the vaporizing receptacle being configured by a body member and a reverse face plate, each being made with a metal plate, the reverse face plate having a shallow dish shape and having an upper, a lower, a left and a right flange standing around the peripheral edges thereof; wherein: the vaporizing receptacle includes a concavity formed on the reverse face plate, the concavity being configured to form an air layer between the vaporizing receptacle and the side face of the storage cabinet body and the vaporizing receptacle, when assembled, has a box shape having a wide width and a narrow depth and an open top face, wherein an attachment plate is provided extending upwardly from a free edge of the upper flange of the reverse face plate, wherein a reverse face of the attachment plate and free edges of the right, left, and lower flanges are positioned in a same plane, and wherein the attachment plate has holes which allow screws to be inserted therethrough so as to be tightened in screw holes provided in the side face of a storage cabinet body and the attachment plate has a notched clearance concavity formed on the top edge of the attachment plate and allowing the drain head to be fitted therein and extending therethrough. a storage cabinet body having a side face; a drain head for draining internal drained water including defrost water to the outside, the drain head protruding from the side face of the storage cabinet body; a vaporizing receptacle for collecting the internal drained water drained from the drain head, the vaporizing receptacle being disposed below the drain head and having a face opposed to the side face of the storage cabinet body; and a heater for vaporizing the drained water; characterized in that the vaporizing receptacle being configured by a body member and a reverse face plate, each being made with a metal plate, the reverse face plate having a shallow dish shape and having an upper, a lower, a left and a right flange standing around the peripheral edges thereof; wherein: the vaporizing receptacle includes a concavity formed on the reverse face plate, the concavity being configured to form an air layer between the vaporizing receptacle and the side face of the storage cabinet body and the vaporizing receptacle, when assembled, has a box shape having a wide width and a narrow depth and an open top face, wherein an attachment plate is provided extending upwardly from a free edge of the upper flange of the reverse face plate, wherein a reverse face of the attachment plate and free edges of the right, left, and lower flanges are positioned in a same plane, and wherein the attachment plate has holes which allow screws to be inserted therethrough so as to be tightened in screw holes provided in the side face of a storage cabinet body and the attachment plate has a notched clearance concavity formed on the top edge of the attachment plate and allowing the drain head to be fitted therein and extending therethrough. the vaporizing receptacle includes a concavity formed on the reverse face plate, the concavity being configured to form an air layer between the vaporizing receptacle and the side face of the storage cabinet body and the vaporizing receptacle, when assembled, has a box shape having a wide width and a narrow depth and an open top face, wherein an attachment plate is provided extending upwardly from a free edge of the upper flange of the reverse face plate, wherein a reverse face of the attachment plate and free edges of the right, left, and lower flanges are positioned in a same plane, and wherein the attachment plate has holes which allow screws to be inserted therethrough so as to be tightened in screw holes provided in the side face of a storage cabinet body and the attachment plate has a notched clearance concavity formed on the top edge of the attachment plate and allowing the drain head to be fitted therein and extending therethrough.