(57) [Abstract] OBJECTIVE even if a blockage in one place of the checker bricks without like can not be used one of the gas flow path over the height of the entire heat storage chamber in the heat storage , to provide a checker brick of hot air furnace that can efficiently heat storage. [Configuration] The gas flow path 12 comrades adjacent to the perimeter of the top surface of the checker brick 10 I to form a bypass flow path 15 communicating with. As a result, the gas flow path 12 gas channel 12 comrades are next to each certain stage of the checker brick and the bypass flow path 15 In and communicates, caused a closing portion 16 in the middle of the gas flow passage 12 also is allowed to bypass that portion can be Ryusuru gas or air, and to allow the heat storage in the same state as before almost clogged as a whole a hot-air oven ing.
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