An electric working machine includes a detector configured to detect a specified rotation position of a brushless motor based on an induced voltage, and a controller configured to control current conduction to the brushless motor by setting a commutation timing in response to a detection of the specified rotation position by the detector. The controller disables setting of the commutation timing based on the specified rotation position detected by the detector during a specified mask time from the commutation timing and increases the mask time as a load of the brushless motor is larger.