To provide a revolutionary stove capable of burning small solid fuel such as wood pellets slowly for a long time while neither increasing thermal power more than necessary nor increasing the amount of consumption in vain and surely achieving the healing efficiency with flames always up.

The stove comprising a combustion cylinder part 2 and a cage part 4 disposed in the combustion cylinder part 2 and storing a large number of small solid fuel pieces 3, is constituted to form a combustion air flow clearance 7 between the outer periphery of the cage part 4 and the inner surface of the combustion cylinder part 2 to allow combustion air to come around so that the small solid fuel pieces 3 in the cage part 4 surrounded by the combustion cylinder part 2 is burnt always in contact with the combustion air.