PROBLEM TO BE SOLVED: To provide a soldering device enabling achieving a high temperature environment and a satisfactory inert gas atmosphere necessary for soldering, with the suppression of device running cost.SOLUTION: The soldering device includes: a power generation part which generates power using a supplied fuel and a gas which includes oxygen, and emits an exhaust gas; an inert gas supply part which supplies, as an inert gas, at least a part of the exhaust gas to the surrounding of a heating object; and a heater part which generates heat with the power, including power supplied from the power generation part, and heats the exhaust gas supplied to the surrounding of the heating object so as to heat the heating object at least through the exhaust gas. Thus, a satisfactory inert gas atmosphere and a high temperature environment necessary for soldering can be achieved using the power and the exhaust gas from the power generation part to which the fuel is supplied.SELECTED DRAWING: Figure 1
