To provide a reheating apparatus which can reheat food by safe and highly efficient heat transfer without damaging the food.

In this apparatus, a chamber has side walls, an upper wall, and the bottom wall. A door through which food is taken in/out the equipped on at least one of the walls. Support members 41 to support a tray inside holding food are set at intervals. A steam generators 43, 94 generate steam. A fan 52 is disposed in a plenum space is formed near by one of the walls to mix air and steam and the mixture gas is moved from the entrance to the exit via the plenum space and returned to the entrance again across the tray. A controller controls the mixture gas under temperature not higher than 212°F to condense steam above food to reheat the food.