To provide a wood fuel combustion device, reducing the size of the combustion device itself, and not requirng indoor work for fuel supply and ash removal by disposing outside a fuel tank for supplying wood pellet fuel or an ash collecting container storing ash generated after the fuel is burnt, and enabling continuous combustion while the interior environment is kept favorable.

The respective carrying devices connecting the combustion part, the fuel tank, or the ash collecting container storing exhaust ash generated in the combustion part and the respective ducts for discharging suction air used for combustion and exhaust air after combustion to the outside of the device are integrally constructed to form a through hole of walls on the interior and exterior side at one portion, whereby the combustion device can be easily installed.