To provide a wood stove having a combustion system without depending on the draft (drawing) effect of a flue, using large part of the heat quantity for heating, reducing heat dissipation to the outdoors, improving the thermal efficiency of heating, and exerting a heating effect in a short time from kindling, while removing almost all the odor and smoke in combustion.

A funnel-shaped flame collector 3 is provided above a combustion chamber 2, and a cylindrical combustion tube 5 is installed to connect with the upper part of the flame collector. A heat exchange outer tube 6 with a smoke vent 6-1 connected to the flue 6-2 in the lower part, is installed to cover the combustion tube.