In a grinder, a motor is accommodated in a housing so that an output shaft faces forward, a paddle switch that turns on and off a drive switch of the motor is supported by the housing so that the paddle switch can be operated to move in a direction perpendicular to the output shaft of the motor, and a brake device that brakes rotation of the output shaft is provided on a front side of the motor in the housing. The grinder includes a cooperative mechanism that releases the brake device in response to a pushing operation of pushing the paddle switch toward the housing to turn on the drive switch.