EXHAUST DEVICE FOR INTERNAL COMBUSTION ENGINE

An exhaust device of an internal combustion engine includes a burner device (40) including a fuel addition device (15) for adding fuel to an exhaust passage (12) of the internal combustion engine (1), and igniting the added fuel, and a controller (50) which detects an abnormal condition of the burner device (40) on the basis of a temperature change at a temperature detection point in the exhaust passage (12) downstream of the fuel addition device (15) after changing the amount of addition of the fuel.