A kimchi refrigerator according to the present invention is provided with an improved door structure capable of reducing the temperature difference between areas of different heights in a storage compartment. In the kimchi refrigerator, an air separation panel is mounted to a lower surface of the door which together with a depression under the door's lower surface defines an air storage chamber. The air storage chamber contains air having a raised temperature due to heat transferred from air inside the storage compartment. The air separation panel separates the air inside the air storage chamber from the air inside the storage compartment. Accordingly, the kimchi refrigerator reduces the temperature difference between the areas of different heights within the storage compartment, and creates a uniform temperature distribution in the storage compartment. Therefore, appropriately fermented kimchi contained throughout the storage compartment is kept cool for a lengthy period of time, and over-fermentation of the kimchi is prevented in an upper area of the storage compartment.