To provide a boiler device capable of being operated by stably burning sawdust as fuel so that the sawdust can be effectively utilized, reducing the emission of a gas of a high environmental load such as a carbon dioxide and a nitrogen oxide, and reducing its operation cost at a low price.

This boiler device (B) comprises a combustion device (1) using sawdust as fuel, and a heat exchanger (2). The combustion device (1) comprises a combustion chamber (10), a supply pipe (37) for supplying the fuel, and a fuel receiving member (16) disposed at a lower part of the supply pipe (37). The supply pipe (37) has a discharge port (370) opened toward the fuel receiving member (16), and the discharge port (370) is formed in a state of being narrowed downward so that a bridge is formed in the inside fuel. The fuel receiving member (16) comprises a plurality of step members (162) in a staircase pattern, and ventilation portions (163) capable of allowing air to pass to the front-back direction are formed between the step members (162), respectively.