To provide a signboard device enabling operation without using commercial electric power, achieving ability to attract customers by a heating function and using flame generated by a combustion device as a light source.

The signboard device comprises: the combustion device; a cylindrical body having the combustion device; an outer casing having the cylindrical body arranged at the center thereof and formed leaving a predetermined space; and a thermoelectric converter arranged on the upper side of the outer casing. Heat generated by the combustion device heats the thermoelectric converter and is converted into electricity, and is discharged upwardly by an air blowing means provided between the cylindrical body and the outer casing to heat the circumference. Flame generated by the combustion device emits light via the cylindrical body and the outer casing.