A power tool includes a main body control unit (CP) that performs PWM control on an output of a motor (M). Whenever the voltage detected by a voltage measurement unit (41) decreases and becomes lower than or equal to a predetermined discharge detection voltage (S1), the main body control unit (CP) drives the motor (M) at a duty ratio that is lower than that before the voltage decreased and became lower than or equal to the predetermined value (S1).
