The invention discloses an electric turbocharger. The electric turbocharger comprises a waste gas turbine, a compressor and a motor mounted on the same shaft; the motor is arranged in the middle position between the waste gas turbine and the compressor; the motor comprises a rotor and a stator; the stator is fixedly mounted on an engine body; the rotor is mounted on the shaft; and bearing modulesare mounted on the shaft between the waste gas turbine and the motor and on the shaft between the compressor and the motor. The invention aims to provide the electric turbocharger; and in the electricturbocharger structure, the motor is arranged between the waste gas turbine and the compressor, so that the space utilization rate is increased.