An injection molding machine, comprising: a converter configured to convert electric power from a power supply and supply the converted electric power to a motor (11, 24) via a DC link; and a control apparatus configured to control the converter for molding at a predetermined molding cycle, wherein the converter is capable of operating in a forward direction to output the converted electric power to the DC link, and in a backward direction to output a converted regenerative electric power of the motor (11, 24) to the power supply, the control apparatus is adapted to instruct the converter to operate in the forward direction in a predetermined time period in the molding cycle such that a voltage of the DC link becomes a predetermined target voltage, characterized in that the converter includes a first electric power converting part and a second electric power converting part connected in parallel between the power supply and the motor (11, 24), the first electric power converting part configured to convert the electric power from the power supply and output the converted electric power to the DC link, the second electric power converting part is capable of operating in the forward direction to output the converted electric power to the DC link, and in the backward direction to output a converted regenerative electric power of the motor (11, 24) to the power supply, and the control apparatus is adapted to instruct the second electric power converting part to operate in the forward direction in a predetermined time period in the molding cycle such that a voltage of the DC link becomes the predetermined voltage. a converter configured to convert electric power from a power supply and supply the converted electric power to a motor (11, 24) via a DC link; and a control apparatus configured to control the converter for molding at a predetermined molding cycle, wherein the converter is capable of operating in a forward direction to output the converted electric power to the DC link, and in a backward direction to output a converted regenerative electric power of the motor (11, 24) to the power supply, the control apparatus is adapted to instruct the converter to operate in the forward direction in a predetermined time period in the molding cycle such that a voltage of the DC link becomes a predetermined target voltage, characterized in that the converter includes a first electric power converting part and a second electric power converting part connected in parallel between the power supply and the motor (11, 24), the first electric power converting part configured to convert the electric power from the power supply and output the converted electric power to the DC link, the second electric power converting part is capable of operating in the forward direction to output the converted electric power to the DC link, and in the backward direction to output a converted regenerative electric power of the motor (11, 24) to the power supply, and the control apparatus is adapted to instruct the second electric power converting part to operate in the forward direction in a predetermined time period in the molding cycle such that a voltage of the DC link becomes the predetermined voltage.