ELECTRIC POWER TOOL

There is provided an electric power tool including: a second voltage supply portion configured to supply, based on a first power supply voltage supplied from a first battery, a second operating voltage for operating a second controller, and configured to supply, based on a second power supply voltage supplied from a second battery, the second operating voltage for operating the second controller; a first voltage line configured to connect a first voltage supply portion and the second voltage supply portion and configured to supply the first power supply voltage; and a backflow suppression circuit configured to permit a current to flow from the first voltage supply portion to the second voltage supply portion in the first voltage line and configured to suppress a current from flowing from the second voltage supply portion to the first voltage supply portion in the first voltage line.