Provided is an internal combustion engine exhaust brake control method capable of increasing a braking force by increasing an exhaust pipe internal pressure when performing exhaust brake control by a vehicle in which an electric turbocharger is connected to an intake system of an engine. The method is a method of driving an electric turbocharger (11) to increase a compressor rotation speed to a predetermined rotation speed and to increase an intake air amount when performing exhaust brake control by a vehicle in which the electric turbocharger (11) is connected to an intake system of an engine (10).