To obtain a combustion chamber structure for woody material that is comparatively inexpensive in comparison with a conventional combustion device, suppressing toxic gas by efficiently carrying out the complete combustion of the woody material having a variety of shapes, and capable of using hot water, steam, or hot air provided by using the obtained high temperature combustion gas for heating a room, a horticultural house or the like.

A basic composition of the combustion chamber structure for a woody material is composed by providing a punching kiln 2 arranged in the internal lower part of the combustion device composed of a porous cylinder body, a rotation driving mechanism for the punching kiln 2, an input mechanism sending objects burned into the punching kiln 2, a primary air sending pipe 6 sending primary air into the punching kiln 2, and a secondary air draft duct 7 supplying secondary air to combustion gas discharged from the punching kiln 2, and the inputted objects to be burned are turned by the rotation of the punching kiln 2 to carry out combustion.