To create non-large-scale secondary-combustion/tertiary-combustion systems of compact and simple mechanisms without degrading its design.

The secondary and tertiary combustion systems are constructed by using ductile cast iron of high heat resistance, and integrating and miniaturizing components for taking the secondary air and the tertiary air, and simultaneously a wood stove body is also integrated by using the same ductile cast iron of high heat resistance, thus the number of components and assembling man-hour can be reduced, and a space for the wood stove as a whole can be saved. The wood stove of good design can be manufactured by spending costs obtained by the cost reduction, for manufacturing components of high decorative performance.