To solve a problem wherein, in conventional stoves burning woody fuel, since a combustion pot and a perforated plate are provided separately, many processes and long time are required for manufacturing, which increases manufacturing cost.

The groove type combustion pot 5 is attached to a combustion apparatus having a combustion chamber 1 with a lower part as an ash receiving chamber 6 in the inner side and including a pellet input hole 9 for inputting plant-derived small solid fuel 8 to be burned in the groove type combustion pot 5 attached to the combustion chamber 1 toward the groove type combustion pot 5. The groove type combustion pot 5 is provided with falling prevention walls 10 erected in the direction intersecting with the input direction of the small solid fuel 8 to prevent the small solid fuel 8 input from the pellet input hole 9 from falling down from the forward/backward direction of the input direction to the ash receiving chamber 6 on the lower side of the combustion chamber 1, and with a perforated plate formed between lower ends of the falling prevention walls 10. The falling prevention walls 10 and the perforated plate are integrally formed of the same member to have a groove shape.