To provide a stove improved in combustion efficiency in comparison with a conventional product by providing a combustion gas vertical flow function in an internal structure of the stove using combustible materials.

A combustion gas 2 generated in a furnace 1 is guided upward in a combustion gas passage inside of the stove and then downward to a secondary combustion chamber 3 to be secondarily burned. A plurality of partitioning plates are disposed in the secondary combustion chamber 3 to divide the vertical flow into a plurality of flows, and the gas is discharged from a chimney 5. In addition to a function to generate the vertical flow, the stove has a function for storing heat in a stove body of large mass and heating indoors by radiation heat.