ELECTRIC POWER TOOL, AND PROCESSOR FOR ELECTRIC POWER TOOL

There is provided an electric power tool including: an electric motor; a communication device; and a first controller including a first storage section configured to store a control program for driving the electric motor, a second storage section configured to store an update program of the control program that is to be received by the communication device, and a processor configured to drive the electric motor by executing the control program after the communication device starts reception of the update program.