The invention discloses an electromechanical metronome. The electromechanical metronome comprises a housing, a power supply unit arranged in the housing, a controller connected with the power supply unit, and a motor and a loudspeaker which are connected with the controller, wherein a swing rod is fixed on an output shaft of the motor, the lower end of the swing rod is located in the housing, the upper end of the swing rod is stretched out of the housing, three sensors are respectively arranged on positions on two sides of the housing and at the lower end of the swing rod, corresponding to the maximum swing amplitude, the sensors are connected with the controller, each sensor sends a trigger signal to the controller when each sensor detects that the lower portion of the swing rod swings to the position of the maximum swing amplitude, the controller controls the motor to reversely rotate, and the motor drives the swing rod to swing back and forth. The electromechanical metronome is obtained by combining machinery with electronics, and overcomes the defects that a mechanical metronome is inaccurate in beat and dissymmetrical in swing amplitude, and an electronic metronome is not visual enough in beat.