PURPOSE: Provided is a deformation preventing structure for a door and a door cover which minimizes the contact area between the door and the door cover, thereby preventing the center thereof from being deformed with the foaming of urethane foams. CONSTITUTION: With the coupling structure for a door(10') and a door cover(100') of a Kimchi reservoir, the inlet-sided inner wall of the door is horizontally cut to form a groove(120), to which the edge of the door cover is coupled. The groove is formed with a bottom portion(130) contacting the edge of the door cover, and a stopper(140) for preventing the center of the door from being expanded due to the foam(110) made therebetween. The distance(B') between the bottom surface of the door and bottom portion of the groove is determined to be larger than the distance(A') between the bottom portion of the groove and the top surface of the door.
