PURPOSE: To prevent steam from concentrating onto the lower surface of a cooking article by supporting the cooking article on a supporting table comprising supporting means having minimum number of contact points between the cooking article and the case thereof.

CONSTITUTION: A supporting table 21 supports a cooking article P and comprises a plurality of supporting means having minimum number of contact points between the cooking article P and the case thereof. The supporting means comprises four supporting arms 24, 25, 26, 27 projecting sideways from a door 15 while spaced apart from each other. The supporting arm 24, 25, 26, 27 has one end coupled with the door 15 and the other end coupled with an arm 28 perpendicular to the supporting arms 24, 25, 27. Consequently, the assemblies 24, 25, 26, 27, 28 form a rectangular frame. According to the structure, steam is prevented from concentrating between the cooking article and the case thereof when a thawing/heating unit is operating.