To provide a structure of a combustion part of a woody pellet stove capable of using the whole wood material including tree bark as the fuel without limiting a specific part of the wood material.

This structure of the combustion part comprises a fire pot 12 receiving the woody pellet fuel A from its upper part, a fire grate 13 forming and holding a hearth by burnably receiving the woody pellet fuel A inside of the fire pot 12 and having a clearance for dropping the burnt ash, and an ash receiver for receiving the ash at a lower part of the fire grate 13. The fire grate 13 is provided with a movable body 31 capable of performing the fire slicing motion for scraping off the hearth by moving while interfering with the hearth accumulated on the fire grate 13.