To provide a motor control apparatus which includes a regenerative energy processing circuit and a DB circuit, shares a resistance of the regenerative energy processing circuit and that of the DB circuit, while simplifying both circuits, and suppresses the loss of both circuits during servo motor driving, while miniaturizing the apparatus itself or reducing the cost.

A servo amplifier for driving a 3-phase servo motor includes three diode elements 1, 2, and 3, a resistor 1, a semiconductor switching element 1, and a control unit for controlling a protection diode element 4 that protects the semiconductor switching element, the semiconductor switching element 1, and an inverter bridge circuit.